Oct 22

In-Service Sign Retroreflectivity Performance in Iowa

Event Details

October 22, 2021


This free webinar will begin at 12:00 p.m. (Central Time)


Details to access the Webex webinar will be emailed along with a confirmation after you register.

Event Contact
David Veneziano
InTrans, Iowa LTAP


Traffic signs represent a significant maintenance and replacement concern and cost for agencies with the advent of retroreflectivity requirements. This webinar will discuss the results of research that evaluated retroreflectivity data from in-service signs in Iowa to determine expected sign life values for agencies. Various linear regression models were developed to evaluate the two components of greatest interest to the research: the age of a sign versus its respective retroreflectivity value and broken down by sheeting type and sign category (regulatory and warning), as well as directional orientation.  The results of the analysis indicated that all sheeting materials, sign types, and sign directions were predicted to have lives of at least 10 years before falling below MUTCD minimums. In general, the predicted lives for a material/sign type/direction combination were greater than five years longer than the manufacturer warranty periods.

Speaker Bio

David Veneziano is Safety Circuit Rider with the Iowa Local Technical Assistance Program (LTAP) at the Institute for Transportation at Iowa State University. Dr. Veneziano earned his Ph.D. in transportation engineering from Iowa State University in 2006. He has over 14 years of experience in various aspects of transportation research, including safety and operational analysis, winter maintenance applications, Intelligent Transportation Systems and remote sensing. In addition, his experience includes outreach and training activities for safety treatments, roadside safety, work zone flagging and safety, and roadway signing and marking.  He has also led numerous road safety assessment efforts in Iowa over the past 6 years.