Lesson

Variable advisory speed limit (VASL) systems encourage drivers to slow down gradually as they approach rural work zones.

An investigation of work zone traffic control in Missouri


08/01/2013
I-270,St. Louis,Missouri,United States


Background (Show)

Lesson Learned

The following recommendations were based on the case studies investigated.
  • Use VASL systems to lower speeds and achieve better compliance with posted speed limits in areas without congestion in urban work zones.
  • Use VASL systems to complement static speed limit signs in areas without congestion in rural work zones. This can lead to safer traffic conditions by encouraging drivers to slow down gradually as they approach work areas.
  • Use simulation modeling to optimize VASL system algorithms. A well designed VASL algorithm, like the 5-minute (P5) algorithm developed in this study can improve mobility and safety in congested work zones.


Lesson Comments

No comments posted to date

Comment on this Lesson

To comment on this lesson, fill in the information below and click on submit. An asterisk (*) indicates a required field. Your name and email address, if provided, will not be posted, but are to contact you, if needed to clarify your comments.



Source

Evaluation of Variable Advisory Speed Limits in Work Zones

Author: Edara, P.; C. Sun; and Y. Hou

Published By: Iowa DOT and U.S. DOT FHWA

Prepared by University of Missouri-Columbia

Source Date: 08/01/2013

URL: http://publications.iowa.gov/14932/1/IA_DOT_TPF-5-081_InTrans_variable_advisory_speeds.pdf

Lesson Contacts

Lesson Analyst:

Mike Mercer
Noblis
(202) 863-3646
michael.mercer@noblis.org


Rating

Average User Rating

0 ( ratings)

Rate this Lesson

(click stars to rate)


Lesson ID: 2014-00678