ISHGD 2022 webinar series | Webinar #2 – Setting Posted Speed Limits

This webinar is part of a series focusing on the 6th International Symposium on Highway Geometric Design, featuring the 6th Urban Street Symposium, which Transoft Solutions is a Gold Sponsor of.

Besides sharing practical details about the symposium, we will be looking into the topic of setting posted speed limits. This will include research and perspectives from North America and Europe.

This webinar provides an example of topics to be presented as part of the symposium. Please consider attending the symposium next summer in Amsterdam to learn about new highway related research and practices that will impact various transportation users.


About the presentation:

TRB National Cooperative Highway Research Program (NCHRP) Project 17-76 was tasked with developing guidance that can be used to make informed decisions related to establishing posted speed limits. The developed guidance was incorporated into a Speed Limit Setting Procedure (SLS-Procedure).

The NCHRP 17-76 SLS-Procedure includes data-driven-based transparent sets of decision rules to determine the suggested speed limit for a given roadway segment. NCHRP Research Report 966: Posted Speed Limit Setting Procedure and Tool: User Guide provides and explains the SLS-Procedure that considers factors beyond the 85th percentile speed, including both driver speed choice and safety associated with the roadway.

This report also provides instructions for using an automated version of the SLS-Procedure via a spreadsheet-based.



  • Kay Fitzpatrick, Senior Research Engineer, Texas A&M Transportation Institute
  • Patrick Broeren, Senior Consultant, Arcadis Netherlands


  • Marjolein van de Nadort, Senior Consultant, DTV Consultants
Webinar Info
Presented By
Kay Fitzpatrick, Senior Research Engineer and Patrick Broeren, Senior Consultant
17:00 CEST / 4 PM BST