Paper version available from: Federal Highway Administration, Research and Technology Report Center, HRD-11, 9701 Philadelphia Court, Unit Q, Lanham, MD 20706.
Some v. distributed to depository libraries in microfiche.
Description based on: 1996; title from cover.
Microfiche. <1996-> [Washington, D.C.] : Supt. of Docs., U.S. G.P.O. microfiches : negative.