traffic weight data warehouse user...
Post on 24-Nov-2020
1 Views
Preview:
TRANSCRIPT
Traffic Weight Data WarehouseTraffic Weight Data WarehouseTraffic Weight Data WarehouseTraffic Weight Data Warehouse
Alaska Department of Transportation and Public Facilities
Division of Program Development
Highway Database
3132 Channel Drive, Suite 200
Traffic Weight Data WarehouseTraffic Weight Data WarehouseTraffic Weight Data WarehouseTraffic Weight Data Warehouse
User Manual
January 29, 2009
Prepared By
Alaska Department of Transportation and Public Facilities
Division of Program Development
Highway Database Management Section
Mary Ann Dierckman
3132 Channel Drive, Suite 200
Juneau, AK 99811-2500
In Partnership with
Wostmann & Associates, Inc.
226 Seward Street, Suite 210
Juneau, AK 99801
Alaska Department of Transportation and Public Facilities
Page 2 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Table of Contents
1 INTRODUCTION ................................................................................................................................. 4
2 WEIGH IN MOTION ........................................................................................................................... 5
2.1 ACTIVE WIM SITES ............................................................................................................................ 7
2.2 WIM PROCESS OVERVIEW ................................................................................................................ 8
2.3 ACCESSING INFORMATION ABOUT THE WIM ............................................................................... 10
3 WEIGH STATIONS ........................................................................................................................... 12
3.1.1 WEIGH STATION PROCESS OVERVIEW ............................................................................................ 13
4 ACCESSING TWDW REPORTS ..................................................................................................... 15
5 TWDW REPORTING ........................................................................................................................ 18
5.1 ADMINISTRATIVE WIM REPORTS ................................................................................................... 18
5.1.1 DATA QUALITY REPORT ................................................................................................................. 19
5.2 WIM REPORTS ................................................................................................................................. 21
5.3 WS REPORTS..................................................................................................................................... 21
6 WIM REPORTING DEFINITIONS ................................................................................................. 23
6.1 VEHICLE CLASS DEFINITIONS ......................................................................................................... 23
6.1.1 MODIFIED FHWA VEHICLE CLASS DEFINITIONS ........................................................................... 23
6.2 REPORTING STANDARDS .................................................................................................................. 27
6.2.1 ALASKA STANDARD DATA (ASD) .................................................................................................. 27
6.2.2 HEARTBEAT .................................................................................................................................... 28
6.3 LANE AND DIRECTION OF TRAVEL .................................................................................................. 29
7 WIM REPORTING OPTIONS ......................................................................................................... 31
7.1 AVAILABLE WIM REPORTS ............................................................................................................. 31
7.1.1 ALASKA STANDARD DATA (ASD) REPORT .................................................................................... 31
7.1.2 CLASS PERCENTAGES REPORT ........................................................................................................ 33
7.1.3 CLASS BY HOUR REPORT ................................................................................................................ 35
7.1.4 CLASS BY HOUR REPORT RAW DATA ............................................................................................ 37
7.1.5 ESAL (EQUIVALENT SINGLE AXLE LOADS) SUMMARY DATA FILE .............................................. 39
7.1.6 HOURLY TRAFFIC COUNTS CHART ................................................................................................. 41
7.1.7 HOURLY TRAFFIC PERCENTAGES REPORT ...................................................................................... 43
7.1.8 OVERWEIGHT DATA FILE ................................................................................................................ 45
7.1.9 RAW DATA FILE .............................................................................................................................. 47
7.1.10 RAW DATA FILE WITH AXLES ....................................................................................................... 49
8 WEIGH STATION REPORT OPTIONS ......................................................................................... 53
8.1.1 CLASS BY DAY REPORT .................................................................................................................. 53
Page 3 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
8.1.2 CLASS BY HOUR REPORT ................................................................................................................ 55
For more information contact Mary Ann Dierckman
Phone: (907) 465-6993
email: maryann.dierckman@alaska.gov
Page 4 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
1 Introduction
This document provides instructions for accessing traffic weight data stored in
the ITS Traffic Weight Data Warehouse. The ITS Traffic Weight Data Warehouse is
a compilation of various traffic related databases including vehicle weight
within the Department of Transportation and Public Facilities (DOT&PF).
Currently, the data warehouse contains information from Weigh-In-Motion (WIM)
and Weigh Station (WS) sites.
The data warehouse is part of the DOT & PF’s internal web-based Highway Data
Port (HDP) located at http://dataport.dot.state.ak.us/. The Highway Data Port
provides report generation of data contained in various data warehouses (such
as Highway Analysis System, Accident Data, and Weigh-In-Motion) based on
user-defined queries. In order to access the Highway Data Port, the user must
have access to the State’s network via a direct connection or via the Virtual
Private Network (VPN).
For the ITS Traffic Weight Data Warehouse information, HDP allows access to two
areas of information, which are discussed in the section with the same name:
• Weigh-in-Motion -- provides the Truck Weight Monitoring portion of the
State's Traffic Monitoring System for Highways using WIM technology.
• Weigh station -- provides scale information for truck weight information
used by the State’s Traffic Monitoring System for Highways using fixed
scales
Page 5 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
2 Weigh In Motion
The Weigh-in-Motion (WIM) program provides the Truck Weight Monitoring
portion of the State's Traffic Monitoring System for Highways. Of all the traffic
monitoring activities, WIM requires the most sophisticated data collection
sensors; the most controlled operating environment (strong, smooth, and level
pavement in good condition), and the most costly equipment to set-up and
calibrate.
WIM systems are designed to measure the vertical forces applied by the truck
axles to sensors in the roadway, thereby providing an estimate of the axle
weights. A WIM Station provides the following data:
• vehicle gross weight
• vehicle weight by axle
• vehicle speed by lane and direction
• vehicle length
• time stamp
• if vehicle is overweight by vehicle classification or axle
• location by lane and direction
• vehicle volume
• vehicle classification
• vehicle speed
WIM data provides information for the following:
• For secondary weight enforcement by the DOT&PF Division of
Measurement Standards & Commercial Vehicle Enforcement (MS&CVE)
• To calculate Equivalent Single Axle Load (ESAL) for pavement and bridge
design
• To calculate Average Annual Daily Traffic (AADT) volumes and generate
vehicle classification reports
• To meet federal reporting requirements
• To report gross vehicle weight by lane and direction
• To report vehicle classification by lane and direction
• To report vehicle count by lane and direction
Page 6 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
• To upload data into the State’s Traffic Monitoring System (TMS)/Highway
and the Highway Accident System Traffic Data System (TDS)
Page 7 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
2.1 Active WIM Sites
The following sites are operational as of the publication of this document.
Region WIM Site HDP Description Highway Milepoint CDS Route
Number
Data
From
Data To
Central Glenn (GLH) Glenn Hwy northbound lane, approx .5
miles south of NB Scalehouse entrance.
Glenn Weigh Station north of
Anchorage (Milepoint 8.547)
135000 9/7/2005 10/9/2006*
Central GNC Glenn Hwy northbound lane, approx .5
miles south of NB Scalehouse entrance.
Glenn Weigh Station north of
Anchorage (Milepoint 8.6)
135000 1/1/2008 Current
Central GSC Glenn Hwy southbound lane, approx .5
miles north of SB Scalehouse entrance.
Glenn Weigh Station north of
Anchorage (Milepoint 8.25)
135000 1/1/2008 Current
Central Tudor (TDS) Tudor Road between Patterson St. and
Kingston Rd.
Strategic Highway Research
Program site in Anchorage
(Milepoint 5.640)
133899 9/30/2003 Current
Central Port of
Anchorage
(POA)
Ocean Dock Road between RR Tracks
and Bluff Rd.
Ocean Dock Road (Milepoint
0.350)
134344 1/1/2003 Current
Central Seward (NSH) New Seward Hwy between 76th Ave.
and Dimond Blvd.
New Seward Highway at 76th
Ave in Anchorage (Milepoint
121.479)
130000 7/28/2003 Current
Central Minnesota (MIN) Minnesota Drive between Strawberry
Rd. and Dimond Blvd Exits.
North of Dimond Blvd in
Anchorage (Milepoint 2.9)
134300 12/31/2002 Current
Northern Tok (TOK) Alaska Hwy at Milepost 1310 or 0.6 miles
west of Tok River crossing
Alaska Highway at Mile point
1310 (Milepoint 85.851)
180000 9/7/2005 Current
Northern Steese (FOX) Steese Hwy between Goldstream Rd. &
Elliot Hwy.
Steese Highway at Steese
Trailings (Between Milepoint
9.581 – 11.094)
152000 8/29/2005 Current
Central Test
Site
Parks (CHU) Parks Highway @ Chulitna Chulitna Test Site at Milepost
118 (Milepoint 82.98)
170000 N/A N/A
*Data from 10/10/2006 to current have not been loaded to the State’s FTP site.
Page 8 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
2.2 WIM Process Overview
WIM data are collected in a proprietary format using International Road
Dynamics (IRD) equipment, and then are loaded into the ITS Traffic Weight Data
Warehouse. The data are collected at each site as a vehicle passes over the
WIM site. The data are stored at the site until automatically pulled from the site.
The data are then transferred using the Juneau FTP (File Transfer Protocol) server
to the Site Processing server for archiving in a data warehouse. The information
can be accessed through the Highway Data Port, where you can generate
charts and reports for each site (see Figure 1).
Page 9 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Figure - 1 - WIM Data Flow Process
Polling Server
WIM Site
WIM Site
WIM Site
Procomm Plus
using Autopoll
script
WIM RAW
DATA
Site Processing
Server
Servers
Oracle DB
ASCII
DATA
storage
Servers
LaptopsWorkstations
Mainframe
HDMS
Data
Interface
User Defined
Process
Using equipment installed in road, information
such as height, weight, width, # of axles, weight
distribution, and speed are collected and stored
in a proprietary format.
The information collected can be
reviewed for historical and on the side
of the road analysis. Where traffic
information is used for enforcement,
access to information can be obtained
via direct connection or network.
Daily collects all WIM
information from all
sites for previous
day.
Stores the centrally
collected information
via FTP.
Processes the centrally
collected information to
determine weight, ESAL,
vehicle class, and speed
for classification and
counts. Data quality is
also determined.
A Data Warehouse
for statewide
information has been
created and the
information is
indexed and stored
for all reporting with
in the State and
FHWA.
Alaska
Standard
Data Format
ChartsASCII Data
FHWA
HAS
Web Interface to Data
Warehouse provides
authorized users access to
the data and the ability to
create reports based on raw
traffic data and personal
selection criteria.
Paul Marrero - WAI
Updated: July 18, 2008
For the Alaska DOT & PF
WIM DATA Flow Process
From Site to Data Warehouse To Users
Standard Class and
weigh tables are
loaded into every site
to insure consistency.
META Data provides
additional details on
data and summary
tables to do
preprocessing for
reports.
Collection Archival Data Retrieval
Page 10 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
2.3 Accessing Information About The WIM
1. Log onto the DOT&PF network by using your SOA enterprise (email) user
name and password to log into either a DOT&PF workstation or the VPN.
2. Start a web browser.
Enter http://dataport.state.ak.us in the web address field.
The following screen appears.
On the left side of the screen, in the blue area, under Information About,
select Weigh-In-Motion.
Page 11 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
The Weigh-In-Motion Program information page appears.
3. Select the Weigh-In-Motion.
The following screen appears.
Page 12 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
3 Weigh Stations
The Weigh Station (WS) is another portion of the State’s Traffic Monitoring System
for Highways. Weigh stations are equipped with scales, some of which permit
the trucks to continue moving while being weighed, while older scales require
the trucks to stop. DOT&PF employs various scale types from single axle scales to
multi-axle sets, depending on the configuration of the weigh station. Signal lights
indicate if the driver should pull over for additional inspection or if the driver can
return to the highway. Each weigh station gathers specific information for every
vehicle that passes through. Currently, the following Weigh Stations are in
Alaska:
Weigh
Station
HDP Description Highway Milepoint CDS Route
Number
Ester Ester Ester Weigh Station at Parks
Highway (Milepoint 313.61)
170000
Fox Fox Hwy scale lane,
approx .5 miles
Fox Weigh Station at Steese
Highway (Milepoint 11.21)
152000
Glenn
Inbound
Glenn Inbound Glenn IB Weigh Station at
Glenn Highway (Milepoint
9.50)
135000
Glenn
Outbound
Glenn Outbound Glenn OB Weigh Station at
Glenn Highway (Milepoint
9.50)
135000
Potter Potter Potter Weigh Station at
Seward Highway (Milepoint
13.70)
130000
Sterling Sterling Sterling Weigh Station at
Sterling Highway (Milepoint
46.34)
110000
Tok Scale lane for Tok site Tok Weigh Station at Alaska
Highway (Milepoint 84.26)
230000
Valdez Valdez
This is NOT an
operating WS...scales
are broken.
Valdez Weigh Station at
Richardson Highway
(Milepoint 3.00)
188000
Page 13 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
A Weigh Station provides the following data:
• vehicle weight by axle
• gross vehicle weight
• vehicle classification
• vehicle length
Weigh Station data is used:
• For weight enforcement by the DOT&PF Division of Measurement
Standards & Commercial Vehicle Enforcement (MS&CVE)
• To calculate Equivalent Axle Load (EAL) for pavement and bridge
design
• To meet federal reporting requirements
• To meet state permitting requirements
3.1.1 Weigh Station Process Overview
At each site, DOT&PF collects data as a vehicle is weighed on the scale. The
scale operator enters data for each vehicle. The data is stored at the site until it
is collected for file transfer.
The data file is transferred from the Juneau FTP (File Transfer Protocol) server to
the Site processing server for archival in a data warehouse.
The information can be accessed through the Highway Data Port, where you
can generate charts and reports for each site (see Figure 2).
Page 14 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Site Processing
Server
Servers
Oracle DB
ASCII DATA
storage
Servers
LaptopsWorkstations
Alaska state-wide
Highway Data
Management
Systems Data
Interface
Stores the centrally
collected information
via FTP.
A Data Warehouse for
statewide information has
been created and the
information is indexed and
stored for all reporting with
in the State and MSCVE.
Alaska
Standard
Data Format
ChartsASCII Data
MSCVE
Web Interface to Data
Warehouse provides
authorized users access to
the data and the ability to
create reports based on raw
traffic data and personal
selection criteria.
Paul Marrero - WAI
Updated: November 29, 2006
Created: October 23, 2003
For the Alaska DOT & PF
Weigh Station DATA Flow Process
From Site to Data Warehouse To
Users
META Data provides
additional details on data and
summary tables to do
preprocessing for reports.
Collection Archival Data Retrieval
Polling Server
WS local
RDBMS
(MS Access)
Daily collects all weigh information
from all sites for current day.
WS site server
Using equipment installed in Weigh
Station scales, information such as
weight, # of axles, weight distribution,
are collected and stored in a
proprietary format.
Processes the centrally collected
information to determine weight,
vehicle class, for classification
and storing.
Figure - 2 – Weigh Station Data Flow Process
Page 15 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
4 Accessing TWDW Reports
1. Log onto the DOT&PF network using your LDAP enterprise (email) user
name and password to log into either a DOT&PF workstation or the VPN.
2. Start a web browser.
3. Enter http://dataport.dot.state.ak.us in the web address field.
The following site appears.
Page 16 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
4. Scroll to the bottom until you see the following options.
The above options access the Traffic Weight Data Warehouse.
• Site
Maintenance
This option requires additional permission from
the Planning section. This option allows the
maintenance of site information, such as
vendors, site names, and sensors. Information on
this option is in the TWDW Operations Manual.
• TWDW
Reporting
This option allows you to create reports on WIM
and Weigh Station sites that allow assessment of
the weight and class of vehicles that passed the
site, the direction of travel, and the time.
5. Select TWDW Reporting.
The following screen appears:
6. Enter your LDAP email username and password.
Now you have access to the Reports screen shown here.
Page 17 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
The reports are listed under the Select Category dropdown list.
Page 18 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
5 TWDW Reporting
TWDW Reporting provides three selections from the Category dropdown list.
5.1 Administrative WIM Reports
This option allows you to generate reports using WIM data and is available to
users with administrative privileges to the Traffic Weight Data Warehouse.
Complete the steps in Section 4 to access this option.
1. From the Category dropdown list, select Administrative WIM Reports.
The left side of the screen populates with a list of reports.
Page 19 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
2. Select the report from the list.
Currently the only available administrative report is the Data Quality
Report discussed in section 5.1.1.
3. Enter the required data.
4. Select the Generate Report button to see the report or the Clear button
to remove your selections.
5.1.1 Data Quality Report
The Data Quality Report is used to assess the quality of the data being provided
by the site. The report provides information on failure of site detection, missing
heartbeats, no data, when the acceptable error rate that was entered is
exceeded, and good lane per day.
Report Type WIM Site Date Range
Acceptable Error Rate Comments
Data Quality Report POA
7/1/2008- 7/15/2008
15
Provided on the next page is an example of the PDF file.
Page 20 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Page 21 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
5.2 WIM Reports
This option allows you to generate reports using WIM data. Complete the steps
in Section 4 to access this option.
1. From the Category dropdown list, select WIM Reports.
The left side of the screen populates with a list of reports.
2. Select the report from the list.
For information about the reports, see section 7. WIM Reporting Options.
3. Enter the required data.
4. Select the Generate Report button to see the report or the Clear button
to remove your selections.
5.3 WS Reports
This option allows you to generate reports using Weigh Station data. Complete
the steps in Section 4 to access this option.
1. From the Category dropdown list, select WS Reports.
The left side of the screen populates with a list of reports.
Page 22 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
2. Select the report from the list.
For information about the reports, see section 8. WS Reporting Options.
3. Enter the required data.
4. Select the Generate Report button to see the report or the Clear button
to remove your selections.
Page 23 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
6 WIM Reporting Definitions
6.1 Vehicle Class Definitions
The Federal Highway Administration (FHWA) sets the standards for vehicle
classification. Several vehicle classification methods exist for monitoring vehicles
on the roads. Alaska Department of Transportation and Public Facilities
(DOT&PF) uses a modified version of the FHWA 13-category scheme.
6.1.1 Modified FHWA Vehicle Class Definitions
The class definitions provided below are the 13 original FHWA classifications
provided plus two specific Alaska classifications (that is, classes 15 and 16). Also,
a Class Zero is used by International Road Dynamics (IRD) to classify WIM field
errors and these error counts are excluded from all counts and classifications.
1 MOTORCYCLES (Optional) – All two- or three-wheeled motorized
vehicles. This category includes motorcycles, motor scooters,
mopeds, motor-powered bicycles, and three-wheel motorcycles.
2 PASSENGER CARS – All sedans, coupes, and station wagons
manufactured primarily for the purpose of carrying passengers.
Page 24 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
3 OTHER TWO-AXLE, FOUR-TIRE SINGLE UNIT VEHICLES – All two-axle,
four tire, vehicles, other than passenger cars.
Note: automatic vehicle classifiers have difficulty distinguishing class 3
from class 2.
4 BUSES – All vehicles manufactured as traditional passenger-carrying
buses with two axles and six tires or three or more axles. This category
includes only traditional buses (including school buses) functioning as
passenger-carrying vehicles.
5 TWO-AXLE, SIX-TIRE, SINGLE UNIT TRUCKS – All vehicles on a single
frame including those with two axles and dual rear wheels.
6 THREE-AXLE SINGLE UNIT TRUCKS – All vehicles on a single frame
having three axles.
Page 25 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
7 FOUR OR MORE AXLE SINGLE UNIT TRUCKS – All trucks on a single
frame with four or more axles.
8 FOUR OR LESS AXLE SINGLE TRAILER TRUCKS – All vehicles with four or
less axles consisting not two units, one of which is a tractor or straight
truck power unit.
9 FIVE-AXLE SINGLE TRAILER TRUCKS – All five-axle vehicles consisting of
two units, one of which is a tractor or straight truck power unit.
Page 26 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
10 SIX OR MORE AXLE SINGLE TRAILER TRUCKS -- All six or more axle
vehicles consisting of two units, one of which is a tractor or straight
truck power unit.
11 FIVE OR LESS AXLE MULTI-TRAILER TRUCKS – All vehicles with five or
less axles consisting of three or more units, one of which is a tractor or
straight truck power unit.
12 SIX-AXLE MULTI-TRAILER TRUCKS – All six-axle vehicles consisting of
three or more units, one of which is a tractor or straight truck power
unit.
Page 27 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
13 SEVEN OR MORE AXLE MULTI-TRAILER TRUCKS – All vehicles with
seven or more axles consisting of three or more units, one of which is a
tractor or straight truck power unit.
14 These are unclassified vehicles because the description of the
vehicle did not meet any classification criteria within the IRD vehicle
classification table.
15 CARS/PICKUP TRUCKS WITH TRAILERS1 -- These are passenger
vehicles pulling recreational or other light trailers.
16 RECREATIONAL VEHICLES1 - These are camping and recreational
vehicles, motor homes, etc., having two or three axles and dual rear
wheels.
6.2 Reporting Standards
6.2.1 Alaska Standard Data (ASD)
The Alaska Standard Data Format2 document contains detailed information
about the standard. ASD data is loaded into the HAS database using the ASD
1 These are being specifically tracked to obtain a count of how many inbounds and outbounds
are crossing the sites. These are specific to Alaska
Page 28 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
load process detailed in the ASD Load Instructions document provided on the
web at http://dataport.state.ak.us. All data fields in the ASD Format
configuration are designed to achieve maximum compatibility with the data
formats defined in Federal Highway Administration’s (FHWA) 2001 Traffic
Monitoring Guide (TMG). The chart below, copied from the ASD Format
Document, provides the layout for the ASD format.
6.2.2 HeartBeat
All WIM stations with the exception of Glenn Hwy record a signal every 15
minutes to log the state of the WIM station. The heartbeat (HBT) signal is typically
logged at :03, :18, :33 and :48 of every hour to provide the state of the
equipment (up/down).
HBT is stored in a database table that collects the signals from the WIM IRD
hardware. These signals indicate the status (or heartbeat) of the equipment. The
WIM_HBTDATA records the condition of electronic equipment at every moment
of data collection and stores it in the <WIM_site>.hbt file.
2 Alaska Department of Transportation, Division of Program Development.
January 29, 1999.
Figure 4c. Classification Data Formats
Field Alpha/
Data Record Column†
Field Name Length Numeric Description
Header (line1) 1-6 *BEGIN 6 A Begin Flag
8-9 CC 2 A Configuration Number
11-12 FF 2 A File Number
14-21 SSSSSSSS 8 A Station ID
23-26 IIII 4 A Record Interval
28 U 1 A Measurement Unit
30-31 PP 2 A Equipment Type
33-34 MM 2 A Equipment Maker
36-51 XXXXXXXXXXXXXXXX 16 A Equipment Serial Number
Header (line2) 1-6 *CLASS 6 A Classification Data Label
29-30 CL01 2 A Column Heading for Class Count, Class 1
34-35 CL02 2 A Column Heading for Class Count, Class 2
39-40 CL03 2 A Column Heading for Class Count, Class 3
44-45 CL04 2 A Column Heading for Class Count, Class 4
49-50 CL05 2 A Column Heading for Class Count, Class 5
54-55 CL06 2 A Column Heading for Class Count, Class 6
59-60 CL07 2 A Column Heading for Class Count, Class 7
64-65 CL08 2 A Column Heading for Class Count, Class 8
69-70 CL09 2 A Column Heading for Class Count, Class 9
74-75 CL10 2 A Column Heading for Class Count, Class 10
79-80 CL11 2 A Column Heading for Class Count, Class 11
84-85 CL12 2 A Column Heading for Class Count, Class 12
89-90 CL13 2 A Column Heading for Class Count, Class 13
94-95 CL14 2 A Column Heading for Class Count, Class 14
99-100 CL15 2 A Column Heading for Class Count, Class 15
104-105 CL16 2 A Column Heading for Class Count, Class 16
107-111 TOTAL 5 A Column Heading for Total Class Count, All Categories
† Column numbers not included in this list indicate space(s).
Page 29 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
To collect this information, a script is used to open the <WIM_site>.hbt file,
convert it to ASCII standard format, and upload the data to the WIM_HBTDATA
table. As part of WIM database, the heartbeat data provides additional
information when collecting and analyzing exception situations, which occur
when WIM electronic equipment does not operate correctly.
By using the heartbeat information available in the WIM data warehouse, users
can separate electronic equipment problems from low traffic issues to exclude
electronic equipment problems.
The following matrix defines how the heartbeat data is included in the Alaska
Standard Data (ASD) report. For example, if the Heartbeat Record Status is
Negative, but the Traffic Records are positive, then the information is not
included in either the ASD Full or the ASD Partial Reports.
Heartbeat
Records Status Positive Negative Negative Missing Missing Positive
Traffic Records Positive Positive Missing Positive Missing Missing
Include Day in
ASD Full
Yes No No Yes No Yes
Include Hour in
ASD Partial
Yes No No Yes No Yes
In addition to the state of the equipment, the entire station may be down and
no message is logged. If a station is down or no heartbeat is recorded, the data
is excluded from the ASD report.
6.3 Lane and Direction of Travel
A lane number and direction of travel is assigned to each truck record. Each
lane is numbered beginning with 1 for the right-hand side of the road for each
direction of travel. Direction of travel in WIM indicates which way the vehicles
are travelling along the lane (North, South, East or West).
(NOTE: ASTM Designation E 1318-02 Standard Specification for Highway Weigh-
In-Motion (WIM) Systems with User Requirements and Test Methods [Soon to be E
1318-09] addresses lane numbering at a WIM site, and the reference to the TMG.
5.4 Lane and Direction Code—A lane and direction-of-travel code for each
vehicle processed by Type I, Type II, and Type III WIM systems shall consist of a
number beginning with 1 for the right-hand northbound or eastbound traffic
lane and continuing until all the lanes in that direction of travel have been
numbered; the next sequential number shall be assigned to the lanes in the
opposite direction of travel beginning with the left -hand lane and continuing
until all lanes have been numbered. Provision shall be made for 12 numbers in
Page 30 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
the code. This code may be used to incorporate information required for FHWA
Truck Weight Data Collection3.)
3 Traffic Monitoring Guide, Third Fourth Edition, February 19952001, U.S. Department of Transportation, Federal Highway Administration, Office of Highway Information Management, Washington, DC 20590.
Page 31 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
7 WIM Reporting Options
7.1 Available WIM Reports
The following sections provide images of the available reports and their data
definitions. The following reports are currently available:
7.1.1. ASD Report
7.1.2. Class Percentages Report
7.1.3. Class by Hour Report
7.1.4. Class by Hour Report Raw Data
7.1.5. ESAL Summary Data File
7.1.6. Hourly Traffic Counts Chart
7.1.7. Hourly Traffic Percentages Report
7.1.8. Overweight Data File
7.1.9. Raw Data File
7.1.10. Raw Data File with Axles
7.1.11. Data Quality Report
7.1.1 Alaska Standard Data (ASD) Report
Three types of ASD Reports are available:
• ASD Full -- excludes bad heartbeat records.
• ASD Full Allowing Bad Heartbeat Record -- includes bad heartbeat
records (no more than one missing Heartbeat and/or no more than
one system status message per day).
• ASD Partial -- includes days with bad hours, but the report excludes
hours with bad heartbeat events. The missing hour(s) that is/are
excluded from the report is/are replaced by a new ASD footer/header,
breaking the day up in separate ASD blocks.
The following data was used to generate the example reports provided below.
Report Type WIM Site Date Range Comments ASD Report Type
ASD Report POA 8/1/2007 One full day of data ASD Full
Page 32 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
A data entry is defined as a set of data records that is complete with a header, a data block, and a trailer. In
data entry, each line is considered a data record. The header and trailer are the records whose first column is
an asterisk (*); they contain the general information about the data type, the station, the equipment, and the
data categories used in the configuration. The other lines make up the data block, which contains traffic
counts. The ASD format displays volume data by vehicle class and hour of each full 24-hour day.
Page 33 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
7.1.2 Class Percentages Report
The Class Percentages report provides the distribution of traffic as a percent by
class. The following data was used to generate the example report provided
below.
Report Type Date Range WIM Site Lane Hours Days of the Week Vehicle Classes
Class Percentages 8/1/2007 POA 1, 2 0000-2300 All
All
Provided on the next page is an example of the Adobe PDF version of the file.
Class By Hour Raw Data Lane_Number Lane the vehicle was in at the time of observation
vehicleClass Class of vehicle
Page 34 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Page 35 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
7.1.3 Class By Hour Report
The Class By Hour report provides the distribution of traffic by class and hour. The
report displays hourly counts for a site by class, site, hour and lane. The following
data was used to generate the example report provided below.
Report Type Date Range WIM Site Lane Hours
Days of the Week
Vehicle Classes
Class by Hour Report 8/1/2007 POA 1, 2 0000-0700 All
All
Provided on the next page is an example of the Adobe PDF version of the file.
Class By Hour Data
tdate Date of the observation ttime Time of the observation Lane_Number Lane the vehicle was in at the time of observation
vehicleClass Class of vehicle
Page 36 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Page 37 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
7.1.4 Class By Hour Report Raw Data
The Class By Hour report provides the distribution of traffic by class with minimal
formatting. The report displays hourly counts for a site by class, site, hour and
lane. The following data was used to generate the example report provided
below.
Report Type Date Range WIM Site Lane Hours Days of the Week Vehicle Classes
Class By Hour Report Raw Data 8/1/2007 POA 1, 2 0000-0700 All
All
Provided below is an example of the MS Excel version of the file.
Class By Hour Raw Data
tdate Date of the observation ttime Time of the observation Lane_Number Lane the vehicle was in at the time of observation
vehicleClass Class of vehicle
Page 38 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Page 39 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
7.1.5 ESAL (Equivalent Single Axle Loads) Summary Data File
This report gives an hourly sum and average of ESALs (Equivalent Single Axle
Loads) for each vehicle class. This report can be used to determine the impact
of this vehicle’s weight to the roadway.
The following data was used to generate the example reports provided below.
Report Type WIM Site Date Range Comments
ESAL Summary Data File POA 8/1/2007 One full day of data
On the next page is an example of the report in Ms Excel format.
ESAL Summary Data File Site Code Name of the location
Lane_Number Lane the vehicle was in at the time of observation
Time_Key Date and time of the observation
Day_OF_Week Day of the week in numerical format
HOUR_OF_DAY Hour of the observation, between 0 and 23
VEH_CLASS Class of the vehicle
ERR_FLAG The error flag number
GVW_OW Gross weight in kips of vehicle (kips = 1000 lbs) for Overweight Vehicles
min_esal Minimum ESAL measured
avg_esal Average ESAL measured
max_esal Maximum ESAL measured
Page 40 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Page 41 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
7.1.6 Hourly Traffic Counts Chart
This report gives vehicle counts for each class for each hour of the day,
including total class counts, total class percentages, and daily class counts.
The following data was used to generate the example report provided below.
Report Type WIM Site Hours Date Range Days of the Week Comments
Hourly Traffic Counts Chart POA
0000-2300 7/1/2007 to 7/31/2007 All
One full month of data
On the next page is an image of the PDF file that is generated.
Page 42 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Page 43 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
7.1.7 Hourly Traffic Percentages Report
This report gives total vehicle counts for each hour of the day, including hour
totals, hour percentages, and daily totals. Traffic volume for this report does not
include class; however, it does give the grand total of all vehicles.
The following data was used to generate the example report provided below.
Report Type WIM Site Hours Date Range Days of the Week Comments
Hourly Traffic Percentages Chart POA
0000-2300 7/1/2007 to 7/31/2007 All
One full month of data
On the next page is an example of the report in PDF format.
1/29/2009 Traffic Weight Data Warehouse User ManualTraffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Page 44 of 57
Page 45 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
7.1.8 Overweight Data File
This report gives, for each class, the total vehicle count, number of valid
vehicles, number of violation vehicles, and percentage of violations. Violations
can occur from single axle, tandem axle, gross vehicle weight, or bridge
regulations for each hour of a day. The following data was used to generate the
example reports provided below.
Report Type WIM Site Date Range Comments
Overweight Data File POA
8/1/2007 to 8/2/2007 Two full days of data
On the next page is an example of the same file in a MS Excel format.
Overweight Data File Site Code Name of the location
Lane_Number Lane the vehicle was in at the time of observation
Time_Key Date and time of the observation
Day_OF_Week Day of the week in numerical format
HOUR_OF_DAY Hour of the observation, between 0 and 23
VEH_CLASS Class of the vehicle
ERR_FLAG The error flag number
GVW_OW Gross weight in kips of vehicle (kips = 1000 lbs) for Overweight Vehicles
VEH_CNT The total count of the vehicles
Page 46 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Page 47 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
7.1.9 Raw Data File
The raw report provides a listing of each vehicle record, with minimal formatting.
Each vehicle record is a string of numbers separated by commas. The following
data was used to generate the example reports provided below.
In newer versions of MS Excel, the ID column may come in as a scientific
number. Simply right click on the column and select Format Cells, then choose
number and zero decimal places. These steps will change the auto-format of
scientific number back to a numeric field so you can see the ID number.
Report Type WIM Site Date Range
Comments
Raw Data File POA 8/1/2007 The full day of data will not fit on one page
Provided on the next page is an example of the MS Excel version of the file.
Raw Data
id Observation number in the WIM or Weigh Station site location Name of the location tdate Date of the observation ttime Time of the observation weekday Day of the week in numerical format year The last digit of the year month Month in numerical format day Day of the observation hour Hour of the observation, between 0 and 23 minute Minute of the observation second Second of the observation tenths Tenth of a second of the observation errorFlag Code signifying an error (0 - no error, 1 - 10 - fatal errors, 11-19 -
general errors, 20-27 - soft errors, 28 - overweight) recordType Number to indicate how the vehicle information was stored. If 11 it
contains traffic and WIM information. 10 - traffic count only lane Lane the vehicle was in at the time of observation speed Calculated speed of the vehicle at the time of observation vehicleClass Class of vehicle length Calculated length in feet of the vehicle, bumper-to-bumper gvw Gross weight in kips of vehicle (kips = 1000 lbs) esal Number of equivalent single axle loads (18,000 lb unit) aviTag Automatic Vehicle Identification tag temp Road temperature at the time of weighing (if sensors are installed) gvw_ow Gross weight in kips of vehicle (kips = 1000 lbs) for Overweight
Vehicles
Page 48 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Page 49 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
7.1.10 Raw Data File with Axles
The raw report provides a listing of each vehicle record, with minimal formatting.
Each vehicle record is a string of numbers separated by commas. The following
data was used to generate the example reports provided below.
NOTE: As this report is very large and uses a lot of web server memory to run, use
a date range of 1 week or less to avoid overloading the system.
In newer versions of MS Excel, the ID column may come in as a scientific
number. Simply right click on the column and select format, then chose number
and zero decimal places. These steps will change the auto-format of scientific
number back to a numeric field so you can see the ID number.
Report Type WIM Site Date Range
Comments
Raw Data File with Axles POA 8/1/2007
The full day of data will not fit on one page
Provided on the next page is an example of the MS Excel version of the file.
Raw Data File with Axles
id Observation number in the WIM or Weigh Station site location Name of the location tdate Date of the observation ttime Time of the observation weekday Day of the week in numerical format year The last digit of the year month Month in numerical format day Day of the observation hour Hour of the observation, between 0 and 23 minute Minute of the observation second Second of the observation errorFlag Code signifying an error (0 - no error, 1 - 10 - fatal errors, 11-19 -
general errors, 20-27 - soft errors, 28 - overweight) recordType Number to indicate how the vehicle information was stored. If 11 it
contains traffic and WIM information. 10 - traffic count only lane Lane the vehicle was in at the time of observation speed Calculated speed of the vehicle at the time of observation vehicleClass Class of vehicle length Calculated length in feet of the vehicle, bumper-to-bumper gvw Gross weight in kips of vehicle (kips = 1000 lbs) esal Number of equivalent single axle loads (18,000 lb unit) weightAxle1 Weight in kips of axle 1 (steering) axle12 Length in feet between axles 1 and 2 weightAxle2 Weight in kips of axle 2 (usually drive axle) axle23 Length in feet between axles 2 and 3 weightAxle3 Weight in kips of axle 3 axle34 Length in feet between axles 3 and 4
Page 50 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
weightAxle4 Weight in kips of axle 4 axle45 Length in feet between axles 4 and 5 weightAxle5 Weight in kips of axle 5 axle56 Length in feet between axles 5 and 6 weightAxle6 Weight in kips of axle 6 axle67 Length in feet between axles 6 and 7 weightAxle7 Weight in kips of axle 7 axle78 Length in feet between axles 7 and 8 weightAxle8 Weight in kips of axle 8 axle89 Length in feet between axles 8 and 9 weightAxle9 Weight in kips of axle 9 axle910 Length in feet between axles 9 and 10 weightAxle10 Weight in kips of axle 10 axle1011 Length in feet between axles 10 and 11 weightAxle11 Weight in kips of axle 11 axle1112 Length in feet between axles 11 and 12 weightAxle12 Weight in kips of axle 12 axle1213 Length in feet between axles 12 and 13 weightAxle13 Weight in kips of axle 13 axle1314 Length in feet between axles 13 and 14 weightAxle14 Weight in kips of axle 14 aviTag Automatic Vehicle Identification tag temp Road temperature at the time of weighing (if sensors are installed) gvw_ow Gross weight in kips of vehicle (kips = 1000 lbs) for overweight
Page 51 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Page 52 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Page 53 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
8 Weigh Station Report Options
These reports and definitions are currently available for Weigh Stations.
8.1.1 Class by Day Report
The Class By Day report provides the distribution of traffic by class and day. The
report displays daily counts for a site by class, site, and lane. The following data
was used to generate the example report provided below.
Report Type Date Range Site Days of the Week
Vehicle Classes Comments
Class by Day Report
7/1/2008-7/31/2008 GOB All
All A month of data
Class By Hour Data
tdate Date of the observation ttime Time of the observation Lane_Number Lane the vehicle was in at the time of observation vehicleClass Class of vehicle
Below is an example of the report in PDF format.
Page 54 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Page 55 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
8.1.2 Class by Hour Report
The Class By Hour report provides the distribution of traffic by class and hour. The
report displays hourly counts for a site by class, site, and lane. The following data
was used to generate the example report provided below.
Report Type Date Range Site Hours Days of the Week
Vehicle Classes Comments
Class by Hour Report
7/1/2008-7/15/2008 GOB All All All
A half month of data
Class By Hour Data
tdate Date of the observation ttime Time of the observation Lane_Number Lane the vehicle was in at the time of observation vehicleClass Class of vehicle
Below is an example of the report in PDF format.
Page 56 of 57
1/29/2009 Traffic Weight Data Warehouse User Manual AK DOT&PF Division of Program Development
Alaska Department of Transportation and Public Facilities
Division of Program Development
Highway Database
3132 Channel Drive, Suite 200
Email: maryann.dierckman@alaska.gov
Alaska Department of Transportation and Public Facilities
Division of Program Development
Highway Database Management Section
Mary Ann Dierckman
3132 Channel Drive, Suite 200
Juneau, AK 99811-2500
Phone: (907) 465-6993
Email: maryann.dierckman@alaska.gov
In Partnership with
Wostmann & Associates, Inc.
226 Seward Street, Suite 210
Juneau, AK 99801
Alaska Department of Transportation and Public Facilities
top related