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 (1998-2006)

5. Compared to…… MICHIGAN (1998-2006)

6. Unrestrained Crashes – Jackson County (1998-2006)

7. Alcohol-Reported Crashes – Jackson County (1998-2006)

8. Speeding-Related Crashes – Jackson County (1998-2006)

9. Jackson County High Crash Intersections

10. Intersection Hot Spots (2004-2006 data) AIRPORT RD @ COUNTY FARM RD AIRPORT RD @ O NEILL DR AIRPORT RD @ SCHEELE DR AIRPORT RD @ W ARGYLE ST AIRPORT RD @ WAYLAND DR ANDREW AVE @ CLINTON RD COOPER RD @ W PARNALL RD E MICHIGAN AVE @ S DETTMAN RD E MICHIGAN AVE @ S GORHAM ST E MICHIGAN AVE @ S MECHANIC ST E WASHINGTON AVE @ FRANCIS ST E WASHINGTON AVE @ S MECHANIC ST LANSING AVE @ W PARNALL RD LAURENCE AVE @ WILDWOOD AVE N BLACKSTONE ST @ W LOUIS GLICK HW N BROWN ST @ W MICHIGAN AVE N WEST AVE @ S WEST AVE N WEST AVE @ W ARGYLE ST N WEST AVE @ W GANSON ST N WEST AVE @ W MONROE ST N WEST AVE @ W NORTH ST N WEST AVE @ WILDWOOD AVE N WISNER ST @ W ARGYLE ST N WISNER ST @ W GANSON ST N WISNER ST @ WILDWOOD AVE REYNOLDS RD @ SPRING ARBOR RD ROBINSON RD @ W MICHIGAN AVE S BROWN ST @ SPRING ARBOR RD S JACKSON ST @ W WASHINGTON AVE S WEST AVE @ W WASHINGTON AVE

11. Hotspots within Greater-Jackson (2004-2006 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 (1997-2004)

20. Average Crashes for Various Weather Conditions (1997-2004)

21. Optimized Time-Space Diagram

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

23. W. Michigan Ave. and N. Westnedge Ave. 2003 Collision Diagram2004 Collision Diagram

24. W. Michigan Ave. and N. Westnedge Ave. 2005 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?