Crash Analysis Tools - Ohio Department of Transportation · 5/12/2011 3 7 Obtaining Data GIS Crash...

5/12/2011

1

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

2

Overview

Crash Data

Crash Analysis

High Crash Location Prioritization

Crash Analysis

3

Crash Reporting

Crash Analysis

5/12/2011

2

4

Crash Reporting

Crash Analysis

Based on MMUCC elements and guidance

Built-in edit checks in electronic version

5

Crash Reporting

Crash Analysis

Location Data Section

6

Sequence of Events

Safety Equipment

Driver Distract By

Crash Reporting

Crash Analysis

5/12/2011

3

7

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

8


http://www.dot.state.oh.us/Divisions/TransSysDev/ProgramMgt/CapitalPrograms/Pages/GCAT.aspx

https://gcat.dot.state.oh.us/

Crash Analysis

9


Crash Analysis

5/12/2011

4

10


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

11


Individual records can be selected

Scanned crash reports can be viewed

Crash Analysis

12


Crash Analysis Module CAM Tool

Crash Analysis

5/12/2011

5

13

GIS Crash Analysis Tool (GCAT)CAM Tool (Continued)

Crash Analysis

14


CAM Tool (Continued)

Crash Analysis

15

ODPS Data

Obtain crash data

Data is similar to the information obtained from GCAT

Requires separate spatial analysis

Intergraph or ESRI products

Crash Analysis

5/12/2011

6

16

ODPS Data – Crash Extracts

Crash Analysis

https://ext.dps.state.oh.us/crashreports/Default.aspx

17


Crash Analysis

18


Crash Analysis

5/12/2011

7

19


Import the downloaded text file into the Microsoft Access Template Provided by ODPS.

Can be obtained from the help menu.

Crash Analysis

20


Crash Analysis

21

ODPS Data – Crash Statistics

Crash Analysis


5/12/2011

8

22


Crash Analysis

23


Crash Analysis

24

Chapter: Chapter 2 – Crash Statistics

Reports: Table 2.02 – Fatalities and Injuries by Month


Crash Analysis

5/12/2011

9

25

ODPS Data – Crash Reports

Crash Analysis


26


Crash Analysis

27


Crash Analysis

5/12/2011

10

28

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)


Crash Analysis

29



30



Crash Data:

2007 to 2009

5/12/2011

11

31



Crash Data:

2007 to 2009

32



Crash Data:

2007 to 2009

33



5/12/2011

12

34



Crash Data:

2007 to 2009

35

SafetyAnalyst


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

36

SafetyAnalyst


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)

0

1

2

3

4

5

6

7

1993 1995 1997 1999 2001 2003 2005

Year

Cra

shes

Long-term average (m)

3- Year average (Xa)

Random error

0

1

2

3

4

5

6

7

1993 1995 1997 1999 2001 2003 2005

Year

Cra

shes



0

1

2

3

4

5

6

7

1993 1995 1997 1999 2001 2003 2005

Year

Cra

shes


3- Year average (Xa)Long-term average (m)


Random error

5/12/2011

13

37

Development of Safety

Priority LocationsSections

Intersections

SafetyAnalyst


38

Questions


Derek A. Troyer, P.E.Division of Planning

Office of Systems Planning and

Program Management

Phone: 614.387.5164

Email: [email protected]

Crash Analysis Tools - Ohio Department of Transportation · 5/12/2011 3 7 Obtaining Data GIS Crash...

Documents

Transcript of Crash Analysis Tools - Ohio Department of Transportation · 5/12/2011 3 7 Obtaining Data GIS Crash...