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Title:

Individual Drivers' Speed Increase in Response to Speed Photo Enforcement and Police Patrol Car

Accession Number:

01478108

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Data were collected on an interstate highway in Illinois for two speed control treatments: police patrol car (Police) and speed radar photo enforcement (SPE) as well as the Base condition with no treatment. The data collection scheme utilized two locations to characterize the effects near the treatment and 1.5 miles downstream. Vehicle observations from the two locations were matched. The paired data were used to analyze the speed change behavior of vehicles between the two data collection locations as a result of the speed control treatments, vehicle type, and lane type. Paired t-tests revealed statistically significant speed increases of 6.1 mph and 5.4 mph between the treatment and downstream locations for Police and SPE, respectively; the speed change for Base condition was not statistically different than 0 mph. The magnitude of average speed change of each treatment was statistically different from each of the others. Travel lane at the treatment location was not a significant factor in speed change but vehicle type (passenger car or heavy vehicle) was a significant factor. Passenger cars had a higher average speed change than heavy vehicles for Police and SPE but lower average speed change for Base. An overwhelming percentage of drivers sped up after treatment in Police (92%) and SPE (85%) while only 48% sped up in the base condition. In Police and SPE, 57% and 54% of drivers were not speeding at the treatment location but sped up such that they were speeding at the downstream; only 13% of the Base group showed this behavior.

Supplemental Notes:

This paper was sponsored by TRB committee AHB55 Work Zone Traffic Control.

Monograph Accession #:

01470560

Report/Paper Numbers:

13-4339

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Lodes, Michael
Benekohal, Rahim F

Pagination:

12p

Publication Date:

2013

Conference:

Transportation Research Board 92nd Annual Meeting

Location: Washington DC, United States
Date: 2013-1-13 to 2013-1-17
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References; Tables

Geographic Terms:

Illinois

Subject Areas:

Highways; Operations and Traffic Management; I73: Traffic Control

Source Data:

Transportation Research Board Annual Meeting 2013 Paper #13-4339

Files:

TRIS, TRB, ATRI

Created Date:

Feb 5 2013 12:50PM