Start date: 08/01/08
End date: 07/31/09
About the research
Provide guidance to county engineers for replacement or upgrading bridge and bridge approach guard railing by --Determining the criteria and guidelines used by other states for bridge and approach guardrail implementation for low and very low-volume roads. --Performing benefit/cost analysis for using bridge and approach guardrails based on traffic levels and road classifications. --Investigating the use of non-standard and innovative bridge and approach guardrails for low-volume roads.
Report: Bridge Rails and Approach Railing for Low-Volume Roads in Iowa (TR-592) (24.1 mb pdf) March 2010
Tech transfer summary: Bridge Rail and Approach Railing for Low-Volume Roads In Iowa (342 kb pdf) Mar 2010
- Iowa Department of Transportation
- Iowa Highway Research Board