MASH TL-3 Deflection Reduction for 31-Inch Guardrail: A Guide
Roadside obstacles are often too close to the roadway to permit the installation of common guardrail
designs. Guardrail systems are often modified with a
combination of tighter post spacing, nesting of rails, and other guardrail stiffening mechanisms to reduce
deflections.
NCHRP Research Report 1100: MASH TL-3 Deflection Reduction for 31-Inch Guardrail: A Guide,
from TRB's National Cooperative Highway Research Program,
presents a guide on the use of stiffening mechanisms to reduce the
deflection for 31-inch guardrail installations while maintaining system integrity and safety performance.
Supplemental to the report are two presentations summarizing the project,
one including videos of crash testing
and
another without the crash-testing videos.
This Summary Last Modified On: 4/15/2024