The design speed for the roadway will not be discussed, except as it may relate to the setting of speed limits. Speed limit enforcement and reevaluation of speed limits are discussed briefly. Special situations, such as advisory, school zone, and work zone speeds are discussed. As an informational report it provides a broad overview of the different speed limit setting methods that are available for use, but it makes no specific policy recommendations or suggestions. This report presents the procedures that highway agencies can and do use to set speed limits. This report provides the information necessary for practitioners to make informed decisions in selecting a method for setting speed limits in their jurisdiction. This leaves practitioners without definitive guidance on this important issue, and in search of information to assist them. At the current time, it appears unlikely that any consensus will be achieved in the near future. It also reviews the basic legalities of speed limits and presents several case studies for setting speed limits on a variety of roads.ĭespite the general acceptance and wide-spread use of speed limits throughout the world, there has been no consensus among practitioners concerning the methods and techniques that should be used to select the most appropriate speed limit for a particular facility. This informational report describes four primary practices and methodologies that are used in establishing speed limits (engineering approach, expert systems, optimization, and injury minimization). ITE Project Manager: Lisa Fontana Tierney Performing Organization Name and AddressįHWA Technical Panel: Craig Allred, Eric Ferron, Michael Griffith Note: Letters in parentheses indicate ITE member grade: M-Member, F-Fellow.ĩ. ITE would also like to acknowledge the Federal Highway Administration staff that reviewed and provided comments on this report: ITE would like to acknowledge the ITE Traffic Engineering Council technical committee members who reviewed and provided comments on this report: ITE would like to acknowledge the following individuals who supplied information or provided comments in the development of this informational report: Westat and Raghavan Srinivasan assisted in the development of the FHWA draft report. for the Federal Highway Administration, Office of Safety in May, 2009. This report was based on a draft report, Best Practices for Setting Rational Speed Limits, prepared by Vanasse Hangen Brustlin, Inc. He was responsible for the technical content and developing the case studies. Forbes (F) served as the ITE Project Consultant and the overall technical editor for this report. Trade or manufacturers' names appear herein solely because they are considered essential to the object of this handbook. The United States Government does not endorse products or manufacturers. It is not intended for construction, bidding, or permit purposes.
This handbook does not constitute a standard, specification, or regulation. The contents do not necessarily reflect the official view or policies of the Federal Highway Administration (FHWA). The contents of this handbook reflect the views of the authors, who are responsible for the facts and the accuracy of the data published herein. In the bottom left corner is the text "FHWA-SA-12-004" and in the bottom right corer is the website link. Under the photos is the text "FHWA Safety Program." At the bottom of the cover design are three logos, from left to right: The US Department of Transportation - Federal Highway Administration logo, the ITE - Institute of Transportation Engineers logo, and the Safe Roads for a Safer Future - Investment in roadway safety saves lives logo. The third photo shows "Speed Limit 25" next to a road in a suburban area with green trees and grass. The second photo shows a "Speed Limit 45" sign with a blue sky and a few clouds behind it. The first photo (on the left, center, and larger than the other photos) has a speed limit sign that reads "Speed Limit 30", next to a two-lane road running through a forest in the fall. ( Extended Text Description: Cover artwork for the publication "Methods and Practices for Setting Speed Limits: An Informational Report." The cover includes photos in the center of the design, depicting various speed limit signs in different environments.
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The formatting has been adjusted for 508 compliance, but all the original text content is included, plus additional text descriptions for the images, photos and/or diagrams have been provided below.) (Note: This document has been converted from the original publication to 508-compliant HTML. Methods and Practices for Setting Speed Limits: An Informational Report
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