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Vehicular crash tests of a nested Thrie beam transition barrier.
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2002-05-01
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[PDF-2.19 MB]
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Abstract:In order to comply with a federal mandate, the California Department of Transportation initiated a project
to develop a bridge rail transition design that met NCHRP Report 350 test level 4 (TL-4) criteria. During the
project a total of three transition designs were tested. The first design pocketed, causing excess floorboard
deformation in the test vehicle. The second design deflected excessively, causing the test vehicle to roll over.
Tests of the third design using 2000-kg vehicles impacting two different locations on the transition proved to
be successful. The third design was also tested with an 8000-kg vehicle in order to establish a TL-4 rating.
The tests on the third transition design showed that it can successfully withstand the impact of both 2000-kg
and 8000-kg vehicles, satisfying the requirements for structural adequacy, occupant risk and vehicle trajectory
of NCHRP 350.
The third design is recommended for operational use as a TL-4 transition.
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