Inexpensive Accident Countermeasures at Narrow Bridges

Bowman, Brian L.; Goodell-Grivas, Inc.

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ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.

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Inexpensive Accident Countermeasures at Narrow Bridges

1987-04-01
By Bowman, Brian L.

English

Details You May Also Like

Details:

Creators:

Bowman, Brian L.
Corporate Creators:

Goodell-Grivas, Inc.
Contributors:

Brinkman, P.
Corporate Contributors:

United States. Federal Highway Administration. Office of Safety and Traffic Operations R&D
Subject/TRT Terms:

[+]

Before And After Studies Bridge Approaches Countermeasures Crashes Highway Delineators Lateral Placement Measures Of Effectiveness Motor Vehicles Narrow Bridges Raised Road Markings Road Markings Speed Traffic Safety Traffic Speed Warning Signs
Publication/ Report Number:

FHWA-RD-87-024
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. Department of Transportation. Federal Highway Administration
Abstract:

This research effort was conducted to determine the effectiveness of low-cost countermeasures in reducing the number of accidents at narrow bridges. The principal tasks consisted of 1) developing an accident based effectiveness evaluation plan and 2) conducting an operational based effectiveness evaluation. This report describes the activities and results of the operational based effectiveness evaluation. The operational based evaluation was performed by conducting before and after analyses of vehicle speed and lateral placement at 18 narrow bridge approach sites. The low-cost countermeasures that were evaluated consisted of combinations of advance warning signs, pavement markings, raised pavement markers, roadside delineators, type 3 object markers and adhesive delineators. The operational data were obtained by using the Federal Highway Administration's Traffic Evaluator System. With the exception of one analysis category, the operational based effectiveness evaluation did not reveal significant difference, at the 10 percent level, between the before and after time period. The one exception was that the low-cost countermeasures significantly reduced speed variation when all vehicle types and time periods were analyzed together. For this analysis category, therefore, the low-cost countermeasures resulted in more uniform driving behavior.
Format:

PDF
Funding:

DTFH61-83-C-00148
Collection(s):

Federal Highway Administration
Main Document Checksum:

[+]

urn:sha256:be26a075c6e997aa456c95f8f09220c3db5769b0166aef0509648fac94d7448f
Download URL:

https://rosap.ntl.bts.gov/view/dot/68383/dot_68383_DS1.pdf
File Type:

[PDF-1.56 MB]