MASH TL-3 Testing and Evaluation of the W-Beam Guardrail on Slope – Phase II (405160-20)

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Final Report Link:  MASH TL-3 Testing and Evaluation of the W-Beam Guardrail on Slope


Links to other phases:

Phase I – 405160-4

Phase III – 603221

TTI Research Supervisor:
Akram Abu-Odeh, Ph.D.
Texas Transportation Institute
Texas A&M University System
TAMU 3135
College Station, Texas 77843-3135
(979) 862-3379
[email protected]
Pooled Fund Technical Representative:
Dave Olson
Design Policy, Standards and Research Manager
Washington State Department of Transportation
P.O. Box 47329
Olympia, WA 98504-7329
[email protected]


The purpose of this project was to develop a MASH TL-3 compliant guardrail for placement on 2H:1V slopes. Such a guardrail system will have application on roadways where the terrain topology limits the available flat terrain needed for typical guardrail performance. Hence, this system was developed to address such limitation. This system has a W-beam rail element mounted at 31 inches high on 8-ft long posts. The posts are placed at 6-ft-3-inch standard spacing. The W-beam rail splices are located between posts. Two crash tests were conducted, MASH Test 3-11 and MASH Test 3-10, and both passed MASH test evaluation criteria.

MASH Test 3-11 MASH Test 3-10


Download (PDF, 14.25MB)


Video for crash test 405160-20-1 (MASH test 3-11):

Video for crash test 405160-20-2 (MASH test 3-10):