United States Department of Transportation
i
Guardrail and bridge rail recommendations for very low-volume local roads in Kansas : [technical summary].
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2014-12-01
[PDF-93.71 KB]
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Abstract:The determination of warrants for bridge railing and approach guardrails is a
fundamental roadside safety issue. These are specialized roadside safety barriers that are
intended to capture and smoothly redirect errant vehicles that leave the roadway either
on the bridge itself or on the approach to the bridge.
The Federal Highway Administration (FHWA) requires tested bridge rails and
approach guardrails on all National Highway System (NHS) Roadways. However,
states are given the discretion
to develop their own policies
for non-NHI roads. Currently in
Kansas, all bridges constructed
with federal funds are required
to have one of the Kansas
Department of Transportation’s
(KDOT) standard bridge rails
(either corral rail or barrier curb)
and approach guardrail (including
transition and end treatment).
These systems are expensive in
terms of the initial cost of a bridge
and they have additional safety
and maintenance considerations
that may outweigh the expected
safety benefits on many low-volume applications
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