United States Department of Transportation
i
0-6711 : short radius MASH TL-3 guardrail treatment.
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2014-11-01
[PDF-623.69 KB]
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Abstract:When a roadway intersects a highway with
restrictive features, such as a bridge rail, it becomes
difficult to fit a guardrail with the proper length,
transitions, and end treatment along the highway.
Possible solutions include relocating the constraint
blocking the placement of the guardrail or designing
a short radius guardrail.
Short radius guardrails typically present the most
viable solution. However, no previously designed
short radius guardrails meet National Cooperative
Highway Research Program (NCHRP) Report 350 Test
Level 3 (TL-3) guidelines. Crash-testing criteria have
been updated by the American Association of State
Highway and Transportation Officials Manual for
Assessing Safety Hardware (MASH). MASH uses
heavier test vehicles than NCHRP Report 350.
Therefore, meeting new impact standards for short
radius guardrails has become even more challenging
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