Below are pointers to two open directories with files from a pair of CDs I got from my participation in the Automated Highway System (AHS) program circa 1995. As far as I know these documents are all in the public domain due to having been the product of government funding. If anyone knows otherwise please let me know. They seem to be difficult documents to find, so I'm posting them to make them more accessible to others.
AHS precursor CD Image
AHS System Objectives and Characteristics CD Image