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Low Profile TL-2 Bridge Rail End Treatment Guidance

Question
State WI
Description Text
WisDOT contacted MwRSF and requested information regarding the use of the sloped end treatment for the TL-2 low profile bridge rail.


Bridge Rails



Date January 27, 2010
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Response
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From our phone conversation today you asked two questions regarding the low-profile bridge rail sloped end treatment.

 

  1. What is the beginning of the LON?
    1. The short answer is that the LON starts at the point where the barrier reaches full height. This is where we are confident of redirection.
  2. What grading is required?
    1. There is no short answer here. For urban installations, many of the grading guidelines for terminals are not followed rigidly due to space restrictions. In addition, there was not enough testing to fully define the grading limits for the slope end treatment. However, the sloped end treatment is essentially a gating terminal. As such, the grading requirements for non-energy absorbing, gating end terminals should apply.

Date January 27, 2010
Previous Views (19) Favorites (0)