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Title:

Determination of Effective Design of Peripheral Transverse Bars to Reduce Speeds on a Controlled Roadway

Accession Number:

01100632

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Previous research focused on using markings spaced at a frequency of four bars per second to reduce vehicle speeds in the field with positive effects. There was a decrease in overall vehicle speeds on approaches to curves when analyzing all vehicles as well as specific classifications of vehicles. A driving simulator study was also performed to look at four different spacing patterns: constant, exponential, two bars per second, and four bars per second. However, the variability of driving speeds in the simulator was high and thus no conclusive evidence was made to support the idea that any marking pattern would perform more effectively. This research effort builds upon the previous two studies by investigating the optimal spacing pattern for peripheral transverse bars to reduce vehicle speeds in a controlled environment on the Virginia Tech Smart Road. Marking spacing patterns of two bars per second and four bars per second were applied to the roadway and compared to baseline conditions with no treatment applied. The primary measures that were investigated include: change in vehicle speed, vehicle speed profile with respect to distance, and brake pedal position with respect to distance. The results showed that the roadway geometry has a major effect on whether or not the pavement marking a marking spacing is effective. The treatment applied on the approach to a curve resembling a freeway exit ramp did have a 42% reduction in speed when a 4 bars per second pavement marking design was applied compared to the baseline.

Monograph Accession #:

01084478

Report/Paper Numbers:

08-1253

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Katz, Bryan
Rakha, Hesham Ahmed

Pagination:

16p

Publication Date:

2008

Conference:

Transportation Research Board 87th Annual Meeting

Location: Washington DC, United States
Date: 2008-1-13 to 2008-1-17
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures (6) ; Photos (2) ; References (11) ; Tables (2)

Geographic Terms:

Virginia

Subject Areas:

Highways; Operations and Traffic Management; Safety and Human Factors; I85: Safety Devices used in Transport Infrastructure

Source Data:

Transportation Research Board Annual Meeting 2008 Paper #08-1253

Files:

TRIS, TRB

Created Date:

Jan 29 2008 3:36PM