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

NCHRP Project 20-5, Topic 32-08 "Cost Effective Structures for Off-System Bridges"


Principal investigators:

Co-principal investigators:

Project status


Start date: 04/01/01
End date: 06/30/02


Report: NCHRP Project 20-5, Topic 32-08 "Cost Effective Structures for Off-System Bridges" (4.3 mb pdf) July 2004


Sponsor(s): Transportation Research Board

About the research

Abstract: The nation?s transportation system includes not only the extensive National Highway System but also the local highway systems that provide important links in the transportation network. Bridges are an essential component of these local systems. The primary focus of this synthesis is on local or off-system bridge design, construction, maintenance, financing, rehabilitation, and replacement. The definition of ?off-system? can vary from place to place. Off-system bridges in this report will refer to those bridges typically owned and maintained by local agencies (i.e., cities and counties) and by state agencies on rural and other low volume roads. Information was gathered from several sources, including a project survey, published literature, electronic media, personal contacts, and manufacturers of bridges or bridge-related products. Several current practice areas that need improvement (e.g., design standards, replacement strategies, and maintenance) were also identified.