the impacts of increased adverse weather events on freight
TRANSCRIPT
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The Impacts of Increased Adverse Weather Events on Freight Movement
Kate Hyun, PhD & Mehrdad Arabi (PhD Student)University of Texas at Arlington
TranSET 8-18-009 ITS
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• Background
• Study Area
• Data
• Methodology
• Preliminary Results
• Conclusion and Future Work
Contents
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• Freight movements expected to increase
42 percent by the year of 2040
• NFSP (US DOT, 2016) reported that
assuming no capacity changes, truck and
passenger vehicle traffic will increase
peak-period congestion by 34 percent in
2040.
Background
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• With significant increases in freight volumes, the impacts from severe
weather events to port truck traffic may cause an economic loss in
Texas and throughout the region
• Because of the ports’ coastal location and global climate change,
adverse weather events, which include flash floods and hurricanes,
have become more frequent and severe.
Adverse Weather Events
https://ane4bf-datap1.s3-eu-west-1.amazonaws.com/wmocms/s3fs-public/ckeditor/files/t2m_anomaly_month_1_to_month_10_2017.png?.meW3juo.WlZXdyG2iiYHmf2PgJcLMC04
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• A Category 4 storm, Hurricane Harvey, brought catastrophic floods to the Houston area inflicting $125 billion in damage
• In the first week, the storm directly affected nearly 10 percent of all US trucking and other transportation throughout the Texas coastal area due to flooded roadways and damaged infrastructure.
Hurricane Harvey, 2017
Source : Forbes, CNN, Wikipedia5
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Texas Freight Mobility Plan
• Maintaining infrastructure and improving system efficiency
by increasing the resiliency of the State’s freight
transportation system and effectively responding to
natural and man-made disasters• A short-term regional plan: developing strategies to minimize the impacts
on multimodal freight network caused by frequent adverse weather
events
• A long-range plan: designing flexible and reliable freight transportation as
a regional priority
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• Characterize the port truck movements by identifying operational
patterns by associated industry and service types and evaluate
system response during adverse weather events
• Investigate the port truck flows from the port of Houston throughout
its metropolitan region (Houston-Galveston Area Council) and
further destinations in the region
Project Goals
7
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Study Area
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The Port of Houston, TX
http://www.h-gac.com/freight-planning/ports-area-mobility-study/documents/180124.HGAC.Project.Workshop-Rev-180124.pdf
Growth in Houston Export Containerized Tonnage
• Located in the fourth-largest city in the US
• The busiest port in the U.S. in terms of foreign
tonnage,
• Second-busiest in the U.S. in terms of overall
tonnage, and
• Sixteenth-busiest in the world
9
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Port Truck Movement
10
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Port of Houston
11
Barbours Cut
https://en.wikipedia.org/wiki/Barbours_Cut_Terminal
Manchester
Bayport Container
Turning Basin
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Port Facilities
12
1
2
3
4 5
6
7 8
9
1- UP Setteggast
2- UP Englewood
3- BNSF
4- Gulf Transport
5- EMS
6- Empire Truck
Lines
7- XPO Logistics
8- WW Rowland
Trucking
9- ConGlobal
https://www.bnsf.com/ship-with-
bnsf/support-services/facility-listings.html
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Data
- Port Truck
13
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• Trucks serving
different industries or
service types have
different delivery
schedules and route-
choice behaviors
Truck Travel Behaviors
14
(a) Port area
Passenger VehicleTractor-Trailer Unit
0
200
400
600
800
1000
1200
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
weekday
weekend
0
200
400
600
800
1000
1200
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
weekday
weekend
0
1000
2000
3000
4000
5000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
weekday
weekend0
1000
2000
3000
4000
5000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
weekday
weekend
Time of day
Vo
lum
e
Time of day
Vo
lum
e
(b) Urban area
0
100
200
300
400
500
600
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
weekday
weekend
0
500
1000
1500
2000
2500
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Time of dayTime of day
Vo
lum
e
Vo
lum
e
Port area
(Port of LA, CA)
Urban area
(Downtown LA)
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• Large-sized GPS data will be used to represent individual trip characteristics such as travel time, origin-destination (OD), major route choice, and industry type
• The larger coverage of GPS data provides a larger portion of vehicle traffic and reduces sampling bias in traffic estimates.
• Before and after Harvey to understand the effect of weather events on truck behaviors faced with a disrupted network
Streetlight GPS Data
15
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Methodology
16
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Types of PMs
– Zonal OD
– Travel routes
Level of geography
- Port
- Regional: FAF
- Local
- Railway Terminal
- Transfer Points (Depot)
- Local warehouses
Performance Measures (PM)
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Methodology Summary
18
Port
• Operation prior to & during Harvey
• Major route choices
Regional
• FAF movements seasonal & during Harvey
• Impacts from link disruption
Local
• Railroad terminal and Depot
• Route choices for local trips
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Preliminary Results
19
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Port Operation – Seasonal
20
0
10000
20000
30000
40000
50000
60000
70000
Barbours Cut Terminal
0
10000
20000
30000
40000
50000
60000
70000
Bayport Container Terminal
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Port Operation – During Harvey
21
0
10000
20000
30000
40000
50000
60000
70000
8/1
1/2
01
7
8/1
4/2
01
8
8/1
5/2
01
9
8/1
6/2
02
0
8/1
7/2
02
0
8/1
8/2
01
7
8/2
1/2
01
7
8/2
2/2
01
7
8/2
3/2
01
7
8/2
4/2
01
4
9/1
/20
17
9/4
/20
17
9/5
/20
17
9/6
/20
17
9/7
/20
17
9/8
/20
17
9/1
1/2
01
7
9/1
2/2
01
7
9/1
3/2
01
7
9/1
4/2
01
7
9/1
5/2
01
7
9/1
8/2
01
7
9/1
9/2
01
7
9/2
0/2
01
7
9/2
1/2
01
7
Average Daily Zone Traffic (Barbours Cut)
0
10000
20000
30000
40000
50000
60000
8/1
1/2
01
7
8/1
4/2
01
8
8/1
5/2
01
9
8/1
6/2
02
0
8/1
7/2
02
0
8/1
8/2
01
7
8/2
1/2
01
7
8/2
2/2
01
7
8/2
3/2
01
7
8/2
4/2
01
4
9/1
/20
17
9/4
/20
17
9/5
/20
17
9/6
/20
17
9/7
/20
17
9/8
/20
17
9/1
1/2
01
7
9/1
2/2
01
7
9/1
3/2
01
7
9/1
4/2
01
7
9/1
5/2
01
7
9/1
8/2
01
7
9/1
9/2
01
7
9/2
0/2
01
7
9/2
1/2
01
7
Average Daily Zone Traffic (Bayport Container)
onset peak recovery onset peak recovery
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Route Choices (Port)
• Normal Days • During Hurricane1970 660
880
2500
12730
22170
Link Volume
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Regional Movements (Neighboring FAFs)
0200400600800
1000120014001600
Beaumont
05000
1000015000200002500030000350004000045000
Houston
onset peak recovery onset peak recovery
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The Impact of Route Disruptions
• Normal Days • During Hurricane
18%
72%100%
Port to Beaumont
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Local Movements
0
50
100
150
200
250
300
350
Normal days(0 week)
Onset(1st week)
Peak(2nd week)
Recovery(3rd week)
Depots 178 145 0 195
Railroad Terminals 329 194 220 292
Ave
rag
e D
aily
Tra
ffic
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• Normal Days • During Hurricane
Route Choices for Local Trips
1001050
26559
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• Hurricane impacted OD movements and Link/Route
choices during a peak and/or recovery times depending
on the…
– type of ports
– types of movements (regional vs. local)
• These spatially and temporally varying patterns (or
resiliency) require further investigations on more
disaggregated level of impact analysis
Conclusion
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• Develop resiliency measures to understand and
quantify the impacts from Harvey
• Develop performance measures to detect the
deviation/abnormality from typical behaviors
• Understand how a single (or multiple) link
disruption(s) may affect local or regional
movements
Future Work
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• Understanding distinct port truck activities and the behavioral changes of freight movements during severe weather events such as Hurricane Harvey represents the first step for fast system recovery to minimize economic, social, and human impacts from the events
• Agencies may adopt a variety of mitigation strategies to enhance resiliency and sustainability of port truck operations by accurately predicting their route choices, transport mode choices, and delivery schedule changes caused by severe weather events.
Potential Applications
29
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COLLABORATE. INNOVATE. EDUCATE.
A Perspective on Intraregional
Freight Planning Capabilities
C. Michael Walton, Ph.D., P.E.
Ernest H. Cockrell Centennial Chair in Engineering
Rydell Walthall
Graduate Research Assistant
The University of Texas at Austin
and the Implications for Megaregional Planning
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COLLABORATE. INNOVATE. EDUCATE.
Today’s Talk
⚫ Importance of understanding planning capabilities
⚫ Creation of a regional planning database
⚫ How planning capabilities vary across MPOs and
regions
⚫ Steps for more consistent freight planning
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COLLABORATE. INNOVATE. EDUCATE.
Today’s Talk
⚫ Importance of understanding planning capabilities
⚫ Creation of a regional planning database
⚫ How planning capabilities vary across MPOs and
regions
⚫ Steps for more consistent freight planning
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COLLABORATE. INNOVATE. EDUCATE.
Importance of understanding
planning capabilities
⚫ Planning capabilities can
affect the types of projects
considered and will affect
project evaluation.
⚫ Planning capabilities vary
from organization to
organization, even within
the same megaregion.
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COLLABORATE. INNOVATE. EDUCATE.
Importance of understanding
planning capabilities
What do we mean by planning
capabilities?
• For this presentation: planning
capabilities include the tools
and inputs do planners have
available
• An example of a tool
would be the travel demand model
available
• An example of input would be voting
seats or committees for stakeholder
involvement
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COLLABORATE. INNOVATE. EDUCATE.
Today’s Talk
⚫ Importance of understanding planning capabilities
⚫ Creation of a regional planning database
⚫ How planning capabilities vary across MPOs and
regions
⚫ Steps for more consistent freight planning
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COLLABORATE. INNOVATE. EDUCATE.
Creation of a Regional
Planning Database
⚫ Database developed in collaboration with two other
CM2 projects
⚫ Variables in the database attempt to capture each
MPO’s inputs for non-automobile modes:
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COLLABORATE. INNOVATE. EDUCATE.
Creation of a Regional
Planning Database
⚫ CM2 Researchers created a comprehensive database
of all 404 MPOs across the country
⚫ The database compiles information about how each
MPO addresses planning for non-automotive
modes, including freight.
⚫ Parts of the database:
− Governance Structures
− Committees
− Modeling Capabilities
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COLLABORATE. INNOVATE. EDUCATE.
Creation of a Regional
Planning Database
⚫ This section of the database examines the size and
make-up of each MPO’s decision-making body
⚫ Looks separately at voting and non-voting
representation on each MPO’s Policy Board
⚫ Variables include the total seats on the policy board, the
total voting seats, and the voting and ex-officio seats for
non-automotive modes
Governance Variables in the Database
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COLLABORATE. INNOVATE. EDUCATE.
Creation of a Regional
Planning Database
⚫ Committees provide platforms for stakeholders to
provide the MPO with feedback on projects
⚫ This part of the database shows for each MPO whether
it has a dedicated planning committee for each mode,
separate from general planning committees.
Committee Variables in the Database
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COLLABORATE. INNOVATE. EDUCATE.
Creation of a Regional
Planning Database
⚫ These variables examine the travel demand model each
MPO uses for its long-range travel plan
⚫ Answers the question: Does the MPO use
forecasting models capable of predicting project
outcomes for non-automotive modes?
⚫ If the MPO’s models cannot analyze the benefits
accruing to a mode, that mode might receive relatively
low funding for projects.
Modeling Variables in the Database
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COLLABORATE. INNOVATE. EDUCATE.
Creation of a Regional
Planning Database
⚫ Researchers used publicly available resources where
available:
− MPO bylaws
− MPO websites
− Model documentation
⚫ When information was not readily available, researchers
contacted MPOs directly.
Sources for the Database
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COLLABORATE. INNOVATE. EDUCATE.
Today’s Talk
⚫ Importance of understanding planning capabilities
⚫ Creation of a regional planning database
⚫ How planning capabilities vary across MPOs and
regions
⚫ Steps for more consistent freight planning
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COLLABORATE. INNOVATE. EDUCATE.
How planning capabilities vary
across MPOs and regions
⚫ With the MPO database, it is possible to answer two
types of questions:
− How do different MPO’s plan for non-automotive
modes?
− How consistent is planning across a
megaregion?
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COLLABORATE. INNOVATE. EDUCATE.
How planning capabilities vary
across MPOs and regions
⚫ To achieve megaregional planning for projects spanning
many MPOs, we need to know how freight planning is
handled across an entire megaregion
⚫ The impacts of freight projects often extend far beyond
the region in which the project occurs.
⚫ This is even more important for projects affecting whole
corridors.
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COLLABORATE. INNOVATE. EDUCATE.
Database Governance Findings
⚫ Most MPOs have up to twenty voting seats, but the
distribution has a long right tail.
⚫ Number of voting seats is not directly related to MPO
population
How planning capabilities vary
across MPOs and regions
Number of Voting Seats
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COLLABORATE. INNOVATE. EDUCATE.
• Very few small MPOs have voting seats dedicated to
transit representation, but most in the upper twenty
percentile population do.
• Very few MPOs of any size have voting seats dedicated
to freight stakeholders.
How planning capabilities vary
across MPOs and regions
Database Governance Findings
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COLLABORATE. INNOVATE. EDUCATE.
⚫ About one in four MPOs have active transport committees;
about one in eight have transit committees.
⚫ Fewer than one in forty MPOs have freight or airport
committees.
− SCAG and NCTCOG are examples
of large MPOs with such committees
− Orange County in New York is
the smallest MPO with such a
committee (population 373,000
in 2010)
Has
Committee
Does Not Have
Committee
Airport 10 394
Active Transport 106 298
Transit 54 350
Database Committee Findings
How planning capabilities vary
across MPOs and regions
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COLLABORATE. INNOVATE. EDUCATE.
⚫ Larger-population MPOs are far more likely to have
committees for non-automotive transport.
⚫ Almost no MPOs have committees dedicated to freight
issues, but several of the larger MPOs have airport
committees
Airport
Active Transport
Transit
Any of the Above
Database Committee Findings
How planning capabilities vary
across MPOs and regions
Decile
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COLLABORATE. INNOVATE. EDUCATE.
⚫ MPOs in every population decile model freight
movements, but the largest MPOs are far more likely to
do so.
⚫ Freight is more likely to be modeled than active
transport; less likely than transit
Active Transport
Freight
Transit
How planning capabilities vary
across MPOs and regions
Database Modeling Findings
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COLLABORATE. INNOVATE. EDUCATE.
Today’s Talk
⚫ Importance of understanding planning capabilities
⚫ Creation of a regional planning database
⚫ How planning capabilities vary across MPOs and
regions
⚫ Steps for more consistent freight planning
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COLLABORATE. INNOVATE. EDUCATE.
Steps for More Consistent
Megaregional Planning
• Many MPOs across the country are considering freight
issues, but there is not consistency across Megaregions.
• Returning to the America 2050 Megaregion Map, many
important freight projects go beyond the scope of any
single MPO, or even state DOT.
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COLLABORATE. INNOVATE. EDUCATE.
• Many megaregions have a
large number of MPOs
with no mechanism in
place to ensure consistent
planning across the
megaregion.
• One exception is Florida,
where all MPOs meet
planning guidelines set-
out by Florida DOT.
MegaregionMPOs within
megaregion
MPOs adjacent
to megaregion
Arizona Sun Corridor 4 1
Cascadia 11 3
Florida 23 3
Front Range 7 1
Great Lakes 71 20
Gulf Coast 19 2
Northeast 46 11
Northern California 12 3
Piedmont Atlantic 34 6
Southern California 6 3
Texas Triangle 9 7
Steps for More Consistent
Megaregional Planning
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COLLABORATE. INNOVATE. EDUCATE.
⚫ State legislatures and DOTs play large roles in
determining MPO governance structures.
⚫ They may be key in providing more representation for
non-automotive modes.
⚫ In Florida, MPOs use models created by the state DOT.
⚫ This has ensured broad planning consistency across
the entire Florida Megaregion.
⚫ The Florida DOT is in the process of developing more
advanced activity-based and dynamic assignment
models, meaning the Florida Megaregion could
become the first to use such planning tools across an
entire megaregion.
Steps for More Consistent
Megaregional Planning
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COLLABORATE. INNOVATE. EDUCATE.
Summary:
⚫ There is a lot of inconsistency in the availability of
planning tools and the methods of stakeholder inclusion
across MPOs in each megaregion.
⚫ Larger MPOs have more planning resources. Smaller
MPOs may require assistance to plan for freight projects
spanning an entire corridor through a megaregion.
⚫ There are similar trends for other non-automotive modes
aside from freight.
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COLLABORATE. INNOVATE. EDUCATE.
C. Michael Walton, Ph.D., P.E.
Ernest H. Cockrell Centennial Chair in Engineering
Dept. of Civil, Architectural and Environmental Engineering
The University of Texas at Austin
301 E. Dean Keeton Street, Stop C1761
Austin, TX 78712
512-471-1414
Rydell Walthall
Graduate Research Assistant
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Methods and Tools for Freight Flow Disaggregation
March 4, 2020
D. Pallme, A. Kosanovic, TN-DOT
K. Pujats, M. Golias, S. Mishra, Univ. of Memphis
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Contents
Brief project overview
Production/Attraction Methods
OD Disaggregation
GIS Tools
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Background
TN DOT Ongoing Study (Began April 2019)
Objective
• Review freight disaggregation methods
• Develop in-house GIS tools
Team members:
• TNDOT: D. Pallme, A. Kosanovic
• UoM: M. Golias, S. Mishra, K. Pujats
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Methods
How do we create disaggregate freight OD?
Approach 1: Productions/Attractions => OD Matrix
Approach 2: OD Disaggregation
Both consider relationship between:
• Commodity producing/consuming industries
• Socio-economic variables
• Some impedance function
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Used Data Sources and Crosswalk Tables
• Transearch
• InfoUSA
• Bureau of Economic Analysis (BEA) Input-Output (IO) Accounts Supply and Use tables
• Network Data (Zones, Links, Facilities)
Data Sources:
• BEA IO Account code to NAICS code crosswalk
• SCTG 2-digit to NAICS 3-digit crosswalk (see Anderson et al., 2013)
Crosswalk Tables:
Anderson, M., Blanchard, L., Neppel, L., Khan, T., 2013. Validation of Disaggregate Methodologies for National Level Freight Data. International Journal of Traffic and Transportation Engineering 2013, 2(3): 51-54. DOI: 10.5923/j.ijtte.20130203.05
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GIS Toolbox
Preprocessing tools: 1. Transearch: SCTG3=>SCTG2 (County level in TN)2. IO Accounts Supply and Use: Industry shares (producing
and using) by IOCode, NAICS3. Spatial and economic data (InfoUSA): Aggregate and
disaggregate values/shares for sq. ft., value of sales, employment
Disaggregation tools: 1. Trip productions/attractions disaggregation=> Create OD
2. Direct OD Disaggregation
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Preprocessing Tools
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Transearch Preprocessing Tool
• From SCTG 3 to SCTG 2 digit code BY:i. Equipment typeii. Trade typeiii. Mode
• Average length (miles between ODs)• Estimate Productions and Attractions (Aggregate Level)
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Spatial and Economic Data Preprocessing Tool
• Economic indicator shares and values at disaggregate level• Centroid of disaggregate and Transearch zones (estimate
travel times or length)
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IO Accounts Supply and Use Table Conversion Tool
• Supply and Use Shares (any level of aggregation available)
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OD Estimation/Disaggregation
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Proportional Weight OD Disaggregation
Transearch Preprocessed OD
Disaggregate Zone Freight Flow by Commodity
SCTG 2-digit to NAICS 3-digit Producing Industry
Crosswalk
IO Accounts Commodity-Producing and Using
Industry Shares
Disaggregate Zone to Aggregate Zone Industry
Shares by Economic Indicator
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Proportional Weight OD
Disaggregation Example Output
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Regression Disaggregation Method Tool
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Regression Method Tool
Example Output
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Next Steps
• Finalize GIS Tool Test• Tonnage to Truck Trip Conversion
• Fix Bugs (if any)
• Validation/ Comparison of the two methods
• Finalize report by August 2020
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Methods and Tools for Freight Flow Disaggregation
March 4, 2020
D. Pallme, A. Kosanovic, TN-DOT
K. Pujats, M. Golias, S. Mishra, Univ. of Memphis