crash analysis tools.pptx - ohio department of transportation
TRANSCRIPT
5/12/2011
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Ohio Department of Transportation
John R. Kasich, Governor Jerry Wray, Director
Crash Analysis Tools
Derek A. Troyer, P.E.Transportation Engineer
Division of PlanningOffice of Systems Planning & Program Management
May 10, 2011
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Overview
Crash Data
Crash Analysis
High Crash Location Prioritization
Crash Analysis
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Crash Reporting
Crash Analysis
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Crash Reporting
Crash Analysis
Based on MMUCC elements and guidance
Built-in edit checks in electronic version
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Crash Reporting
Crash Analysis
Location Data Section
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Sequence of Events
Safety Equipment
Driver Distract By
Crash Reporting
Crash Analysis
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Obtaining Data
GIS Crash Analysis Tool (GCAT)
Open to County Engineers and MPO’s
Ohio Department of Public Safety (ODPS)
Open Source
Crash Data for the past 5 years
Crash Analysis
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GIS Crash Analysis Tool (GCAT)
http://www.dot.state.oh.us/Divisions/TransSysDev/ProgramMgt/CapitalPrograms/Pages/GCAT.aspx
https://gcat.dot.state.oh.us/
Crash Analysis
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GIS Crash Analysis Tool (GCAT)
Crash Analysis
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GIS Crash Analysis Tool (GCAT)
Data can be selected using a polygon tool to select corridors, intersections, etc.
Results set can be exported to Excel for further analysis
Crash Analysis
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GIS Crash Analysis Tool (GCAT)
Individual records can be selected
Scanned crash reports can be viewed
Crash Analysis
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GIS Crash Analysis Tool (GCAT)
Crash Analysis Module CAM Tool
Crash Analysis
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GIS Crash Analysis Tool (GCAT)CAM Tool (Continued)
Crash Analysis
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GIS Crash Analysis Tool (GCAT)
CAM Tool (Continued)
Crash Analysis
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ODPS Data
Obtain crash data
Data is similar to the information obtained from GCAT
Requires separate spatial analysis
Intergraph or ESRI products
Crash Analysis
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ODPS Data – Crash Extracts
Crash Analysis
https://ext.dps.state.oh.us/crashreports/Default.aspx
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ODPS Data – Crash Extracts
Crash Analysis
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ODPS Data – Crash Extracts
Crash Analysis
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ODPS Data – Crash Extracts
Import the downloaded text file into the Microsoft Access Template Provided by ODPS.
Can be obtained from the help menu.
Crash Analysis
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ODPS Data – Crash Extracts
Crash Analysis
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ODPS Data – Crash Statistics
Crash Analysis
https://ext.dps.state.oh.us/crashreports/Default.aspx
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ODPS Data – Crash Statistics
Crash Analysis
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ODPS Data – Crash Statistics
Crash Analysis
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Chapter: Chapter 2 – Crash Statistics
Reports: Table 2.02 – Fatalities and Injuries by Month
ODPS Data – Crash Statistics
Crash Analysis
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ODPS Data – Crash Reports
Crash Analysis
https://ext.dps.state.oh.us/crashreports/Default.aspx
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ODPS Data – Crash Reports
Crash Analysis
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ODPS Data – Crash Reports
Crash Analysis
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State System Analysis (IR, US, SR)
Spatially locate crashes
Aggregation the crash details to segments
Weight each location based on Total Number of Crashes, Crash Severity (Fatal, Incapacitating Injuries, & Minor Injuries), and Average Daily Traffic (ADT)
High Crash Location Prioritization
Crash Analysis
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High Crash Location Prioritization
Crash Analysis Tools
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High Crash Location Prioritization
Crash Analysis Tools
Crash Data:
2007 to 2009
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High Crash Location Prioritization
Crash Analysis Tools
Crash Data:
2007 to 2009
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High Crash Location Prioritization
Crash Analysis Tools
Crash Data:
2007 to 2009
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High Crash Location Prioritization
Crash Analysis Tools
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High Crash Location Prioritization
Crash Analysis Tools
Crash Data:
2007 to 2009
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SafetyAnalyst
Crash Analysis Tools
Agencies That Participated in SafetyAnalyst DevelopmentCalifornia Department of Transportation
Colorado Department of Transportation
Florida Department of Transportation
Georgia Department of Transportation
Illinois Department of Transportation
Indiana Department of Transportation
Iowa Department of Transportation
Kansas Department of Transportation
Kentucky Transportation Cabinet
Louisiana Department of Transportation
Maryland State Highway Administration
Massachusetts Highway Department
Michigan Department of Transportation
Minnesota Department of Transportation
Mississippi Department of Transportation
Missouri Department of Transportation
Nevada Department of Transportation
New York State Department of Transportation
North Carolina Department of Transportation
Ohio Department of Transportation
Vermont Agency of Transportation
Virginia Department of Transportation
Washington State Department of Transportation
Wisconsin Department of Transportation
Delaware Valley Regional Planning Commission
North Jersey Transportation Planning Authority
Traffic Improvement Association, Oakland County,
Michigan
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SafetyAnalyst
Crash Analysis Tools
State-of-the-Art Safety Methodology
Number of crashes in any given time is unpredictable due to Regression-to-the-Mean
Average expected number of crashes can be predicted (More reliable than short-term observed crash counts)
Safety is measured by statistical methods
Crash counts used to estimate long-term averages along with
Regression analysis of similar sites (Safety Performance Functions
– SPFs)
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1993 1995 1997 1999 2001 2003 2005
Year
Cra
shes
Long-term average (m)
3- Year average (Xa)
Random error
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1993 1995 1997 1999 2001 2003 2005
Year
Cra
shes
Long-term average (m)
3- Year average (Xa)
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1993 1995 1997 1999 2001 2003 2005
Year
Cra
shes
Long-term average (m)
3- Year average (Xa)Long-term average (m)
3- Year average (Xa)
Random error
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Development of Safety
Priority LocationsSections
Intersections
SafetyAnalyst
Crash Analysis Tools
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Questions
Crash Analysis Tools
Derek A. Troyer, P.E.Division of Planning
Office of Systems Planning and
Program Management
Phone: 614.387.5164
Email: [email protected]