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

High-Speed Expressway Intersections Study of Crash Risk Factors


Principal investigators:

Student researcher:

Project status

In progress

Start date: 11/01/05
End date: 06/30/06


Sponsor(s): Iowa Department of Transportation

About the research

Abstract: This proposal is to extend the recently completed Empirical Bayes analysis of expressway intersections by evaluating a number of factors to identify those that are associated with successful or unsuccessful signalization projects. This will be done by accomplishing the following: Evaluate the signalization including timing, signal warrants, and auxiliary flashers Evaluate the character of the intersections in terms of access density (on the side road), type and amount of adjacent development, and physical characteristics (orientation, grade, median width, elevation differences between lane groups, and curves).