Speed Management: Noteworthy Practice and Guidance

Project Details
STATUS

Completed

PROJECT NUMBER

InTrans Project 19-685

START DATE

01/01/19

END DATE

11/30/19

FOCUS AREAS

Safety

RESEARCH CENTERS InTrans, CTRE
SPONSORS

Iowa Department of Transportation

Researchers
Principal Investigator
Shauna Hallmark

Director, InTrans

Co-Principal Investigator
Neal Hawkins

Associate Director, InTrans

About the research

Speeding, defined as exceeding the posted speed limit or driving too fast for conditions, contributes to approximately one-third of all traffic fatalities and costs society about $40.4 billion each year.

The guidelines developed for this project focus on two strategies to reduce speeding:

  • Setting proper speed limits, which is key to ensuring reasonable and safe speeds
  • Using dynamic speed feedback sign (DSFS) systems, traffic control devices that have been used successfully to reduce speeds

The guidelines include a summary of the current state of the practice and best practices for setting speed limits and a summary of best practices for using DSFS and recommendations on their use.

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