Evaluation of Speed Limit Policy Impacts on Iowa Highways

The proposed research will involve a detailed study of speed-related trends on Iowa rural interstates, as well as on the high-speed non-freeway system including two-lane and multi-lane highways. This study will specifically examine current trends in travel speeds, as well as traffic crashes, injuries, and fatalities over time. Finally, the economic impacts associated with increasing speed limits on rural interstates will be assessed. This study will address the safety and operational impacts of increasing the speed limit on rural interstates in Iowa. The proposed work is comprised of the following tasks: Task 1. Conduct Literature Review; Task 2. Collect National-Level Data; Task 3. Collect Iowa-Specific Data; Task 4. Analyze National-Level Data; Task 5. Analyze Iowa-Specific Data; Task 6. Examine Design Issues; and Task 7. Prepare Final Project Report.

  • Supplemental Notes:
    • Contract to Performing Organization has not yet been awarded. Addendum 622.


  • English


  • Status: Completed
  • Funding: $150000
  • Contract Numbers:

    Add 622

  • Sponsor Organizations:

    Iowa Department of Transportation

    800 Lincoln Way
    Ames, IA  United States  50010
  • Principal Investigators:

    Savolainen, Peter

  • Start Date: 20170701
  • Expected Completion Date: 20181231
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01645867
  • Record Type: Research project
  • Source Agency: Iowa Department of Transportation
  • Contract Numbers: Add 622
  • Files: RIP, STATEDOT
  • Created Date: Sep 7 2017 4:16PM