Traffic Crash Characteristics for Jackson Area Transportation Study

Wayne State University Transportation Research Group

November 26, 2007

Map of MPO Boundaries

Jackson

Jackson County Crash Trends

Total, Injury, and Fatal Crash Trends – Jackson County (1998-2006)

Total, Injury, and Fatal Crash Trends in Jackson County (1998-2006)

29 21 22 22 20 17 21 14 21

1310 1259 1170 1229 1114 1062 1062 1131 1024

6910 7030 6958 70716910

7057

6676 6562

6050

0

1000

2000

3000

4000

5000

6000

7000

8000

1998 1999 2000 2001 2002 2003 2004 2005 2006

Year

Cra

sh

Fre

qu

en

cy

Fatal Injury Total

Compared to……MICHIGAN (1998-2006)

Total, Injury, and Fatal Crash Trends for Michigan (1998-2006)

404,793417,040

426,704

402,167 396,989 393,421

375,049

352,260

316,835

92,014 88,993 88,372 82,078 81,694 77,890 74,500 68,01261,341

1,261 1,279 1,280 1,237 1,213 1,220 1,085 1,066 1,0260

50,000

100,000

150,000

200,000

250,000

300,000

350,000

400,000

450,000

1998 1999 2000 2001 2002 2003 2004 2005 2006

Year

Cra

sh

Fre

qu

en

cy

Total Injury Fatal

Unrestrained Crashes – Jackson County (1998-2006)

Unrestrained Crash Trend for Jackson (1998-2006)

461487

517

478466

428

503

575 570

200216

154141

101127 130

153

125

2310 13 9 6 8 7 9 70

100

200

300

400

500

600

700

1998 1999 2000 2001 2002 2003 2004 2005 2006

Year

Cra

sh

Fre

qu

en

cy

Total Injury Fatal

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

Alcohol Related Crash Trend for Jackson (1998-2006)

388

361343

319

299

271259

236 236

170 163

136129

10998 102

90100

174 7 14

6 5 5 5 100

50

100

150

200

250

300

350

400

450

1998 1999 2000 2001 2002 2003 2004 2005 2006

Year

Cra

sh

Fre

qu

en

cy

Total Injury Fatal

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

Speeding Related Crash Trend for Jackson (1998-2006)

445

494 500

476

500479

450

481

326

140

170

133 139

112100 99

115

87

3 1 2 4 6 2 1 3 30

100

200

300

400

500

600

1998 1999 2000 2001 2002 2003 2004 2005 2006

Year

Cra

sh

Fre

qu

en

cy

Total Injury Fatal

Jackson County High Crash Intersections

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

Hotspots within Greater-Jackson(2004-2006 data)

NN

Project Objectives

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

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

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

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

Engineering

Signal timing plans

Signal equipment improvements

Policy-Related

Enforcement

Education

Behavioral-Related

Targeted enforcement to improve driver behavior

Countermeasures

Example Results – Kalamazoo County MPO

0

200

400

600

800

1000

1200

1400

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

1997 1998 1999 2000 2001 2002 2003 2004

0

500

1000

1500

2000

2500

3000

1997 1998 1999 2000 2001 2002 2003 2004

Sunday Monday Tuesday Wednesday Thursday Friday Saturday

0

200

400

600

800

1000

1200

1400

1600

1800

6am-9am (3 hrs) 11am-1pm (2 hrs) 4pm-6pm (2 hrs) 10pm-5am (7 hrs)

1997 1998 1999 2000 2001 2002 2003 2004

Average = 417.5

crashes/hr

Average = 558.8

crashes/hr

Average = 848.6

crashes/hr

Average = 191.6

crashes/hr

To

tal C

rash

Fre

qu

ency

Month

To

tal C

rash

Fre

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ency

To

tal C

rash

Fre

qu

ency

Day

Time

Temporal Crash Trends (1997-2004)

Average Crashes for Various Weather Conditions (1997-2004)

severe w ind14%

sleet/hail8%

rain25%

snow /blow ing snow16%

clear5%

fog/smoke11%

cloudy10%

uncoded11%

uncoded

clear

cloudy

fog/smoke

rain

snow /blow ing snow

severe w ind

sleet/hail

Optimized Time-Space Diagram

W. Michigan Ave. and N. Westnedge Ave.

Existing Condition Diagram

W. Michigan Ave. and N. Westnedge Ave.

2003 Collision Diagram 2004 Collision Diagram

N

LEGENDCollision Diagram for N Westnedge Avenue and W Michigan Avenue Intersection for 2003

Rear-End

Backed Into

Head On

Angle

Left-Turn Head-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

W MICHIGAN AVENUE

N W

EST

NE

DG

E A

VE

NU

E

1

2

3

45

6

7

8

9

10

11 12

13

14

15

29

17

18

19

2021 22

23

24

25

31

2827

3036

33

34

35

37

38

39

40

41

42

43

44

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-Turn Head-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

1

**2

3 **4

5

6

789

11

12

13

14 15

16

17

18

19

20

10

212224

25

**

23

26

Collision Diagram for N Westnedge Avenue and W Michigan Avenue Intersection for 2004

W MICHIGAN AVENUE

N W

EST

NE

DG

E A

VE

NU

E

W. Michigan Ave. and N. Westnedge Ave.

2005 Collision Diagram

N

LEGENDRear-End

Backed Into

Head On

Angle

Left-Turn Head-On

Sideswipe

Fixed Object

Parked Vehicle

Pedestrian

Other

Injury

Fatality

**

25

2623

16

4

620

5

14

7

8 1915 22

2730

17

9

21

10

2

1328

11

1229

1

18

3

24

Collision Diagram for N Westnedge Avenue and W Michigan Avenue Intersection for 2005

W MICHIGAN AVENUE

N W

EST

NE

DG

E A

VE

NU

E

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

Questions?