I was contacted yesterday by FHWA about a construction project that will be bid on in February. The FHWA had some concerns about some of the roadside safety devices being used on this project.
As I looked at the plan, I found out that the designer has developed a special detail to install steel bars to make a box culvert traversable (see attached details). I believe that the safety pipe runner s spacing is correct. The inside diameter of the safety pipe runners are slightly over sized.
My concerns are:
I know that MwRSF tested a traversable safety runner design for a culvert.
Would it be possible to get a copy of the report (I probably have one buried somewhere in my files, but given the time frame for response, I do not know if I will have a chance to look at it).
I am not sure I have enough details from what you sent to answer all of your questions completely, but I will start with answering what I can and then we can move forward from there.
To answer the questions below:
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