Research notes : two-rail steel-backed timber guardrail : Crown Point Highway , Multnomah Country , Oregon.
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1995-05-01
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Alternative Title:Two-rail steel-backed timber guardrail : Crown Point Highway , Multnomah Country , Oregon.
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Abstract:The Oregon Department of Transportation (ODOT) installed a two-rail steel-backed timber guardrail along a section of the Historic Columbia River Highway, formerly known as the Crown Point Highway, in March 1992 as an experimental features project. The guardrail was designed to simulate the 1920s timber rail used along the Columbia River Highway which later became a national standard. The two-rail steel-backed timber guardrail was approved for use by the Federal Highway Administration (FHWA) after it was crash tested by the Texas Transportation Institute (TTI).
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