Guidance for the Setting of Speed Limits
The objectives of this research were to (1) identify and describe factors that influence operating speed and (2) provide guidelines to make informed decisions related to establishing speed limits on roadways. The guidelines are to address the following: (a) an approach for determining the relationship between operating, design, posted and statutory speeds and how the differences among them impact safety performance; (b) identification and classification of nationwide data including, but not limited to, geometric design, access density, signal density, traffic volume characteristics, and enforcement practices that may impact operating speed; (c) an analysis of the 85th percentile speed and other statistical measures and factors as appropriate methods for setting speed limits; (d) implications of setting a speed limit lower than those recommended using the factors identified above. The focus of the research was on roadway functional classifications of minor arterials and higher as defined by AASHTO.
Language
- English
Project
- Status: Completed
- Funding: $500000
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Contract Numbers:
Project 17-76
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Sponsor Organizations:
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590American Association of State Highway & Transportation Officials (AASHTO)
444 North Capitol Street, NW, Suite 225
Washington, DC United States 20001National Cooperative Highway Research Program
Transportation Research Board
500 Fifth Street, NW
Washington, DC United States 20001 -
Project Managers:
Jared, David
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Performing Organizations:
Texas A&M Transportation Institute, College Station
Texas A&M University System
3135 TAMU
College Station, TX United States 77843-3135 -
Principal Investigators:
Fitzpatrick, Kay
- Start Date: 20161007
- Expected Completion Date: 20200331
- Actual Completion Date: 20200331
- Source Data: RiP Project 40216
Subject/Index Terms
- TRT Terms: Crash causes; Crash severity; Design speed; Guidelines; Highway safety; Operating speed; Speed limits; Traffic volume
- Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors;
Filing Info
- Accession Number: 01572384
- Record Type: Research project
- Source Agency: Transportation Research Board
- Contract Numbers: Project 17-76
- Files: TRB, RIP
- Created Date: Aug 7 2015 1:01AM