01123265

Component

There is a need to investigate strategies to reduce pedestrian-vehicle crashes at intersections. The leading pedestrian interval (LPI) has been recommended as one strategy for reducing pedestrian-vehicle crashes at signalized intersections; however, there has been limited research to quantify the safety effects of the LPI. Site characteristics, traffic volumes, pedestrian volumes, and crash data were obtained for 10 signalized intersections where the LPI was implemented in State College, Pennsylvania. Similar data were obtained for 63 reference sites within the State College area. An empirical Bayes approach was incorporated in a before-after study design to evaluate the safety effectiveness of the LPI implementations. The aggregate analysis indicated a 37 percent reduction in pedestrian-vehicle crashes, which is significant at the 90 percent confidence level. A disaggregate analysis indicated that crash reductions are significantly greater at intersections with larger pedestrian volumes. Given the low-cost of this strategy, a modest reduction in crashes is needed to justify their use. Based on the estimated safety effectiveness, the necessary crash reduction is easily achievable.

01120148

09-1308

English

14p

2009

Transportation Research Board 88th Annual Meeting

DVD

Figures (2) ; References (14) ; Tables (4)

Crash data; Crashes; Pedestrian vehicle crashes; Pedestrian vehicle interface; Safety; Signalized intersections; Traffic safety; Traffic volume

Crash reduction factors; Leading pedestrian intervals

State College (Pennsylvania)

Highways; Operations and Traffic Management; Safety and Human Factors; I83: Accidents and the Human Factor

Transportation Research Board Annual Meeting 2009 Paper #09-1308

TRIS, TRB

Jan 30 2009 5:33PM