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TRB Webinar: Guidance for Setting Speed Limits

July 26, 2021

2:00 PM - 3:30 PM (EDT)

Past

Topics

Several factors are considered within engineering studies when determining the posted speed limit, including the 85th percentile speed during free-flow conditions and the segment’s crash history. TRB hosted a webinar on Monday, July 26, 2021, from 2:00-3:30 PM Eastern that discussed a new speed limit setting procedure and tool (SLS-Tool) developed to aid in making informed decisions about the setting of speed limits. The development of the SLS-Tool considered previous research along with current research data from Austin, Texas and Washtenaw County, Michigan.

This webinar features research from NCHRP Research Report 966: Posted Speed Limit Setting Procedure and Tool, NCHRP Web-Only Document 291: Development of a Posted Speed Limit Setting Procedure and Tool, and two versions of the SLS-Tool:
N17-76 SLS-Tool (with macros) and
N17-76 SLS-Tool (without macros)

The slides are linked in the meeting materials below. Click here to view the recording.

Webinar agenda and presenters

  1. Overview: Kay Fitzpatrick, Texas A&M Transportation Institute
  2. Findings from Michigan: Tim Gates, Michigan State University
  3. Findings from Texas: Kay Fitzpatrick, Texas A&M Transportation Institute
  4. SLS Procedure and Tool demonstration: Michael Pratt, Texas A&M Transportation Institute
  5. Question and answer session: Moderated by Kevin Haas, Oregon Department of Transportation

The first 60 minutes of the webinar will be for presentations and the final 30 minutes will be reserved for audience questions.

Learning Objectives

At the end of this webinar, participants will be able to:

  1. Identify factors that determine speed limits
  2. Compute a suggested speed limit using the SLS tool

Professional Development Hours

Professional Development Hours (PDHs) earned on completion of this program were reported to the Registered Continuing Education Program (RCEP). Certificates of Completion are issued to all participants via the RCEP.net online system. Complaints about registered providers may be addressed to RCEP, 1015 15th Street, NW, 8th Fl., Washington, DC, 20005.

Disclaimer

It is essential to the National Academies mission of providing evidence-based advice that participants in any of our meetings or events avoid political or partisan statements or commentary and maintain a culture of mutual respect. The statements and presentations during our meetings or events are solely those of the individual participants and do not necessarily represent the views of other participants or the National Academy of Sciences, which is a non-partisan, tax exempt organization that includes under its Charter the National Academy of Engineering and National Academy of Medicine, and that operates the National Research Council.

Contact

Contact us

TRB Webinar
TRBwebinar@nas.edu

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