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GIS Crash DataFLORIDA DEPARTMENT OF TRANSPORTATION – CRASH DATA ACADEMY
SHAUN DAVIS , FDOT – STATE SAFETY OFFICE
MAY 19, 2016
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How to ask a question:
FDOT CRASH DATA ACADEMY 2
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How to download handouts:
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AgendaTechnical Overview (10 min)
Why use GIS to analyze crashes?
Location Data Sources
Data Structure
Data Access
Data Analysis
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Pardon the Nerding
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Decoding the File Names On / Off – Crash Level State / Non-State
Von / Voff – Vehicle Level State / Non-State
Oon / Ooff – Person Level State / Non-State
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Location Data SourcesLocation information from crash report
Interpreted by Analyst◦ Accuracy
Transformed into Shapefiles◦ State Roads
◦ Linear Referencing
◦ FDOT Transportation Statistics Basemap
◦ Local Roads◦ NavTeq / HERE Map
◦ Crash placed at Latitude / Longitude
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Accessing Metadata - PDFs
Available in the handout pod.
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Accessing Metadata - ArcMap
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Accessing Metadata - ArcCatalog
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Data Relationships
Crash
1 Record Per Crash
Report
Unique Field:
KEYFIELD1
(Year + Crash Report #)
Vehicle
1 Record Per Motor Vehicle
in Crash
Unique Field: KEYFIELD2
(Year + Crash Report # + Vehicle #)
Person1 Record Per Person In
Crash Report (excluding witnesses)
Unique Field: KEYFIELD3
(Year + Crash Report # + Vehicle # + Person #)
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Crash Data CollectedCrash
◦ Time / Date
◦ Weather
◦ Location
◦ Roadway Information
◦ Causes / Event
◦ Summaries of Vehicle / Person
◦ Flags for SHSP + Vehicle / Person
Vehicle◦ Type
◦ Traffic Control Type
◦ Events
Person◦ Person Type
◦ Identifying Information
◦ Drugs / Alcohol
◦ Non Motorists
◦ Safety Equipment
◦ Citations
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ArcGIS ToolsBuffer
Point Density
Kernel Density
Overlay Tools (Spatial Join, Identity, Intersect)
Spatial Statistics
Linear Referencing Tools◦ Data has measures (Point M)
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ESRI Crash Analysis Tools
Link to this tool is in the handout pod.
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Using .dbf tablesPrograms◦ Excel
◦ SAS (Statistical Analysis System)
◦ R
◦ ArcGIS◦ Export to Excel Tool
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What is a GIS?A geographic information system or geographical information system (GIS) is a system designed to capture, store, manipulate, analyze, manage, and present all types of spatial or geographical data. https://en.wikipedia.org/wiki/Geographic_information_system
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Credit: Gareth Lloyd, Conversocial / Slideshare.net
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Why use GIS to analyze crashes?Limitations of an Linear Referencing System
◦ Roadway ID @ Mile Point
Analyze State + Non – State Crashes Spatially
Include additional data◦ Census
◦ Economic
◦ Land Use
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Why use GIS to analyze crashes?Pedestrian Crashes and Median Household Income
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Location Data SourcesLocation information from crash report
Interpreted by Analyst◦ Accuracy
Transformed into Shapefiles◦ State Roads
◦ Linear Referencing
◦ FDOT Transportation Statistics Basemap
◦ Local Roads◦ NavTeq / HERE Map
◦ Crash placed at Latitude and Longitude
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Crash Report Location Information
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Non – State Road Crash Location
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State Road Crash Location
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Data RelationshipsExample:
On May 19th, 2016 at 3:22 PM, a Geo Metro with a driver and a passenger is driving west on Main St. and rear ends a Ford Pinto with a driver and no passengers at the intersection of 1st
Avenue. The Ford continues forward and strikes a pedestrian in the cross walk. The pedestrian suffers “Possible” injuries.
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Data RelationshipsCrash Level
◦ Crash Report#: 12345678
◦ Date: Thursday, 5/19/2016
◦ Crash Time: 3:22 PM
◦ Crash Type: Rear End
◦ Location: Main St @ 1st Ave, Tallahassee, Leon County, FDOT District 3, DOT Road# 12345 MP 1
◦ Roadway Information
◦ Injury Level: Possible
◦ Environment / Weather
◦ Counts
◦ Strategic Safety Plan Flags
Vehicle Level◦ Geo Metro – Vehicle 01
◦ Ford Pinto – Vehicle 02
◦ Type, Traffic Control, Events, Mechanical Problems
Person Level◦ Person 1 – Driver – Vehicle 01
◦ Person 2 – Passenger – Vehicle 01
◦ Person 3 – Driver – Vehicle 02
◦ Person 4 – Non-Motorist – Vehicle 00
◦ Type, Age, Actions / Errors, Non-Motorist, Impairment, Citations
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Data Relationships
Crash
1 Record Per
Crash Report
Unique Field:
KEYFIELD1
(Year + Crash Report #)
Vehicle
1 Record Per Motor Vehicle
in Crash
Unique Field: KEYFIELD2
(Year + Crash Report # + Vehicle #)
Person1 Record Per Person In
Crash Report (excluding witnesses)
Unique Field: KEYFIELD3
(Year + Crash Report # + Vehicle # + Person #)
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Data StructureRoadway System◦ “On” – State Roads
◦ “Off” – Non-State Roads
Shapefile Record Level◦ Crash – On / Off
◦ Vehicle – Von / Voff
◦ Person – Oon / Ooff
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Data AccessPublic Tools◦ FDOT SSOGis
◦ FIRES Portal
◦ GIS @ FDOT / ArcGIS Online
◦ Fatality Analysis and Reporting System (FARS)
Restricted Tools◦Signal 4 Analytics
◦FIRES Portal
Links to these tools are in the handouts pod.
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GIS @ FDOT / ArcGIS Online http://fdot.maps.arcgis.com
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GIS @ FDOT / ArcGIS Online
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GIS @ FDOT / ArcGIS Online
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GIS @ FDOT / ArcGIS Online CRASH DATA
Maps◦ Bike / Pedestrian Clusters
Data / Layers◦ Crash Shapefiles (2011 to 2014)
◦ Bike / Ped Crash Clusters
◦ Bike / Ped Crash Counts by County
◦ Bike / Ped Crash Shapefiles
◦ 5 Year Segment / Intersection Crash Rates
◦ High Crash Intersections
◦ 65+ Crash Counts by County
ROADWAY INFORMATION
Maps / Apps◦ Bike Friendly Roads
◦ SUN Trail
◦ Active Construction Projects
◦ Work Program
Data / Layers◦ State Road Inventory
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FDOT SSO GIS Query Tool
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FDOT SSO GIS Query Tool
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FDOT SSO GIS Query Tool - Table
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FDOT SSO GIS Query Tool –Table Groupings
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FIRES Portal – Public / RestrictedQuery + Map
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Signal 4 Analytics (S4A)
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Signal 4 Analytics (S4A)
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Signal 4 Analytics
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FARS
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FARS Fatality Map
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Data Analysis Tools - ArcGISBuffer
Point Density
Kernel Density
Overlay Tools (Spatial Join, Identity, Intersect)
Spatial Statistics
Linear Referencing Tools◦ Data has measures (Point M)
ESRI Crash Analysis Tools◦ usRAP Methodology
◦ Inputs◦ Crash Density
◦ Roadway Inventory
◦ Outputs◦ Crash Density
◦ Crash Rate
◦ Crash Rate Ratio
◦ Potential Crash Savings
◦ Link in handouts pod
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Finding Tools in ArcMap
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Data Analysis – Intersect + Density
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Using GIS tablesPrograms◦ Excel
◦ SAS (Statistical Analysis System)
◦ ArcGIS◦ Export to Excel Tool
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Using GIS tables in ExcelUse .dbf file
MAKE A COPY!!
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Using GIS tables in Excel
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Using GIS tables in Excel
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Crash Data Academy WebinarsState Safety Office GIS Query Tool
June 23, 2016 @ 2:30 PM (Eastern)