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Traffic Crash Characteristics for Jackson Area Transportation Study Wayne State University Transportation Research Group November 26, 2007.

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Presentation on theme: "Traffic Crash Characteristics for Jackson Area Transportation Study Wayne State University Transportation Research Group November 26, 2007."— Presentation transcript:

1 Traffic Crash Characteristics for Jackson Area Transportation Study Wayne State University Transportation Research Group November 26, 2007

2 Map of MPO Boundaries Jackson

3 Jackson County Crash Trends

4 Total, Injury, and Fatal Crash Trends – Jackson County ( )

5 Compared to…… MICHIGAN ( )

6 Unrestrained Crashes – Jackson County ( )

7 Alcohol-Reported Crashes – Jackson County ( )

8 Speeding-Related Crashes – Jackson County ( )

9 Jackson County High Crash Intersections

10 Intersection Hot Spots ( data) AIRPORT COUNTY FARM RD AIRPORT O NEILL DR AIRPORT SCHEELE DR AIRPORT W ARGYLE ST AIRPORT WAYLAND DR ANDREW CLINTON RD COOPER W PARNALL RD E MICHIGAN S DETTMAN RD E MICHIGAN S GORHAM ST E MICHIGAN S MECHANIC ST E WASHINGTON FRANCIS ST E WASHINGTON S MECHANIC ST LANSING W PARNALL RD LAURENCE WILDWOOD AVE N BLACKSTONE W LOUIS GLICK HW N BROWN W MICHIGAN AVE N WEST S WEST AVE N WEST W ARGYLE ST N WEST W GANSON ST N WEST W MONROE ST N WEST W NORTH ST N WEST WILDWOOD AVE N WISNER W ARGYLE ST N WISNER W GANSON ST N WISNER WILDWOOD AVE REYNOLDS SPRING ARBOR RD ROBINSON W MICHIGAN AVE S BROWN SPRING ARBOR RD S JACKSON W WASHINGTON AVE S WEST W WASHINGTON AVE

11 Hotspots within Greater-Jackson ( data)

12 Project Objectives

13 Determine crash trends and characteristics for Jackson County Select 30 high-crash locations for detailed analyses MPO will ultimately select Collect and analyze crash data (UD-10 forms) Crash types Specific location of crash Probable causes of crashes Collect and analyze traffic operational data Recommend site-specific countermeasures Project Objectives

14 For the 30 study intersections: Peak period traffic counts Speed studies Existing condition survey Traffic control devices Driveways Lane assignments Preparation of site diagrams Photographs of all sites Field Data Collection

15 Pattern analysis Day vs. Night Various weather conditions Peak vs. Off-peak Crash types (rear end, angle, left-turn head-on, etc.) Special circumstances (unbelted, alcohol, speeding & red light running, etc.) Crash causation analysis Countermeasures suggested for correctable crashes Crash Analysis

16 For each intersection: Traffic flow analysis Peak flow diagrams Speed data analysis Capacity analysis Evaluation of Level of Service (LOS) Safety deficiency analysis Geometric Traffic control Environmental Corridor analysis Traffic Operations and Safety Analysis

17 Engineering Signal timing plans Signal equipment improvements Policy-Related Enforcement Education Behavioral-Related Targeted enforcement to improve driver behavior Countermeasures

18 Example Results – Kalamazoo County MPO

19 Total Crash Frequency Month Total Crash Frequency Day Time Temporal Crash Trends ( )

20 Average Crashes for Various Weather Conditions ( )

21 Optimized Time-Space Diagram

22 W. Michigan Ave. and N. Westnedge Ave. Existing Condition Diagram

23 W. Michigan Ave. and N. Westnedge Ave Collision Diagram2004 Collision Diagram

24 W. Michigan Ave. and N. Westnedge Ave Collision Diagram

25 List of Recommendations: Provide adequate clearance intervals Install mast-arm traffic signals Relocate stop bars Post speed limit signs downstream of the intersection Upgrade lane markings Provide stop signs for driveways Implement optimized PM signal timing W. Michigan Ave. and N. Westnedge Ave. Proposed Diagram

26 Questions?


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