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Low Speed Concrete Barrier Terminal (TB-4)

This plan provides the necessary details to construct the low speed concrete barrier terminal noted in the WSDOT Design Manual Chapter 1610.

 TB-4.jpg, 5kb

This terminal can be used as an end treatment for Type 2 Concrete Barrier on roadways with a posted speed of 35 mph or less.

These terminals are used infrequently, and concrete products companies willing to do the work inexpensively may be difficult to locate. The initial cost for this terminal might be as high as a manufactured impact attenuator; however, long-term maintenance costs will be significantly less.


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