Traffic Crash Study

1300 EAST

February 2013

SAFETY IMPROVEMENTS

CONSTRUCTION SEGMENTS

Segment 2 Segment 3Segment 1

Segment Segment LimitsStart of Construction End of Construction

(1st Day of Traffic Control) (Substantial Completion)

1 Creek Rd though 8600 S Friday, May 8, 2009 Wednesday, March 3, 2010

2 8625 S through 9400 S Wednesday, March 3, 2010 Friday, July 30, 2010

3 9425 S through 11000 S Thursday, July 15, 2010 Wednesday, June 8, 2011

⇦

CRASH DATA BY SEGMENT

Segment 2 Segment 3

115 / 78-32%

54 / 43-19%

130 / 71-45%

Crashes per year Before Construction/ Crashes per year After Construction

Percent Difference

Segment 1 ⇦

CRASH DATA TOTAL

Segment 2 Segment 3

298 / 192-36%

Segment 1

Crashes per year Before Construction/ Crashes per year After Construction

Percent Difference

106 fewer Crashes per year

⇦

CRASH DATA BY SECTION

Signal - C

reek R

oad

Sectio

n 1A

Sectio

n 1B

Signal - 7

720 S

outh

Sectio

n 1C

Signal - F

orbush

Lane

Sectio

n 1D

Sectio

n 1E

Signal - 8

600 S

outh

Sectio

n 2A

Sectio

n 2B

Signal - 9

400 S

outh

Sectio

n 3A

Signal - R

idgemark

Driv

e

Sectio

n 3B

Sectio

n 3C

Signal - S

ego Lily

Driv

e

Sectio

n 3D

Sectio

n 3E

Signal - 1

0600

South

Sectio

n 3F

Signal - 1

1000

South0

5

10

15

20

25

30

35

Before Construction After Construction

Ave

rage

Num

ber o

f Cra

shes

per

Yea

r

More than a 60% Crash Decrease Crash Increase

SECTION AREAS: BREAKDOWN

⇦

Main Intersections

137 / 103-25%

Crashes per year Before Construction/ Crashes per year After Construction

Percent Difference

Roadway Sections

161 / 90-44%

CRASH SEVERITY CLASSIFICATION

1. No Injury/Property Damage Only (PDO)2. Possible Injury3. Non-Incapacitating Injury4. Incapacitating Injury5. Fatal

CRASH SEVERITY BY SEGMENT

Segment 2 Segment 3

1 85/58 -32%2 17/8.5 -50%3 9.7/9 -7%4* 2.3/2.5 +7%

1 41/28 -32%2 6.7/11 +60%3 4.7/2.7 -43%4* 1/2 +100%

1 93/49 -47%2 23/9 -60%3 11/9 -21%4* 2.7/4 +50%

Severity Before After Percent per year Construction Construction Difference

Segment 1 ⇦

* Data sets are to small to be statistically valid, more time/data is needed to verify if the increase is more than a random occurrence.

CRASH SEVERITY BY SEGMENT

Segment 2 Segment 3

1 219/135 -37%2 46/28 -40%3 26/21 -19%4 6/8.5 +33%

Segment 1 ⇦

Severity Before After Percent per year Construction Construction Difference

* Data sets are to small to be statistically valid, more time/data is needed to verify if the increase is more than a random occurrence.

CONCLUSIONS & RECOMMENDATIONS

Conclusions 36% decrease in crashes (106 fewer crashes per year) Severity 1-3 crashes decreased along the corridor

Recommendations Analyze Severity 4 and 5 crashes for a possible trend

which may be mitigated Analysis of 7720 South and Commercial Area 1

Intersections Reduce Red Light Runners

Analysis of Buttercup Drive Intersection Reduce Car vs. Pedestrian Crashes

Continue Street Lighting South to the Draper Parkway

SPECIAL THANK YOU

Ryan KumpTraffic Engineer, Sandy City801-568-2999