jmcsummit
MUTCD is a good place to start, if you are referring to location of placement criteria. FHWA website.
Who you are designing "for" should have standards that will dictate your parameters. We have standards for: Freeways, two lane, TWLTL, Divided Highway, Super 2, etc. and so on.
And of course there is quite a bit of variance on how organizations want it done with regard to materials. Is your rdwy. concrete, ACP, OCST? This will make a difference as to materials.
Hope this helps.
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