Traffic Barrier Systems Service Level 1 (SL-1) Bridge Rail: Final Report, FHWA Demonstration Project No. 64

The Washington State Department of Transportation (WSDOT) designed and installed Service Level 1 (SL-1) bridge rails on three treated timber bridges in the state. To date, there have been no accidents or maintenance problems reported at any of the modified bridges.


Publication Date: 
Monday, August 1, 1988
Publication Number: 
WA-RD 106.2
Last modified: 
10/12/2016 - 15:41
Don Gripne.
Washington (State). Dept. of Transportation.
Number of Pages: 
Bridge railings, Evaluation and assessment, Guardrails, Roads, Safety, Wooden bridges.