frequently asked questions: barriers terminals transitions
31 aug 2017 a similar project (nchrp 20-7(257)) synthesizing information on portable concrete barrier shapes connections anchorages and other considerations will also be completed soon. as noted at the . barriers include w-beam guardrail jersey barriers ("k-rail" in california) steel barriers bridge railings weak post cable barriers certain water-ballasted plastic units and crash cushions. they must be an exception exists where "remove and reset" conditions apply.