CTRE is an Iowa State University center, administered by the Institute for Transportation.

Address: 2711 S. Loop Drive, Suite 4700, Ames, IA 50010-8664

Phone: 515-294-8103
FAX: 515-294-0467

Website: www.ctre.iastate.edu/

Iowa State University--Becoming the Best

Developing a Rural and Urban Roadway Lighting Practical Design Guide for Iowa

Overhead flashing light next to stop sign

Use of overhead flashing beacons at all-way stop intersections

Researcher(s)

Principal investigators:

Co-principal investigators:

Student researchers:

Project status

Completed

Start date: 08/01/05
End date: 03/31/08

Publications

Report: Strategies to Address Nighttime Crashes at Rural, Unsignalized Intersections (2.71 mb pdf) February 2008

Tech transfer summary: Strategies to Address Nighttime Crashes at Rural, Unsignalized Intersections (168 kb pdf) Feb 2008

Sponsor(s)/partner(s)

Sponsor(s): Iowa Department of Transportation

About the research

Abstract:

Citizens request the installation of roadway lighting in their communities based on several motivations, including the experience or perception that lighting improves traffic safety and reduces crime, while also providing a tangible benefit of taxpayer dollars at work. Roadway authority staff fully appreciate these citizen concerns; however, roadway lighting is expensive to install, supply energy to, and maintain in perpetuity. The installation of roadway lighting is only one of a number of strategies agencies have to address nighttime crash concerns. This research assists local agencies in deciding when, where, and how much rural intersection lighting to provide.