Traffic Sign Life Expectancy

Project status

In progress

Start date: 09/01/16
End date: 02/28/18


Principal investigators:

About the research

At present, there is only a limited understanding of the service life of signage in the field (largely based on manufacturer guidance as opposed to field data and experience). Yet knowing how long a sign will maintain adequate retroreflectivity and remain in acceptable condition is essential in avoiding potentially unnecessary maintenance or replacement costs.

This project will attempt to evaluate the retroreflectivity service life of signage in the field to determine expected sign life values. The information and analysis through this project should be of value to agencies in understanding the service life of signs in the field and more effectively applying their selected management method of sign replacement.


Sponsor(s): Iowa Department of Transportation