Innovative concepts and technology for railroad-highway grade crossing motorist warning systems. Vol. II: the generation and analysis of alternative concepts. Final report.

Transportation Systems Center, Cambridge, Mass.

Union list of scientific and technical periodicals in the libraries of Greater Cincinnati,

Mode of access: Internet.

Federal Highway Administration Research and Technology Program highlights, 1993.

Mode of access: Internet.

Federal Highway Administration Research and Technology Program highlights, 1994.

Mode of access: Internet.

Federal Highway Administration Research and Technology Program highlights, 1995.

Mode of access: Internet.

Federal Highway Administration Research and Technology Program, 1994-1998.

Mode of access: Internet.