81St Annual Meeting of the Transportation-Research-Board, Date: JAN, 2002, Location: WASHINGTON, D.C., Patrocinadores: Transportat Res Board, US Dept Transportat, Res & Special Programs Adm, Bur Transportat Stat, Fed Aviat Adm, Fed Highway Adm, Fed Motor Carrier Safety Adm, Fed Railroad Adm, Fed Transit Adm, Natl Highway Traff Safety Adm, Res & Special Programs Adm, NASA, USA Corps Engineers, US Coast Guard, US DOE, US EPA, Amer Publ Transportat Assoc, Amer Transportat Res Inst, Assoc Amer Railroads, Natl Asphalt Pavement Assoc