Part one examines the secret attempts by the trucking industry to win railroad support of changes in federal law that would allow more LCVs (Longer Combination Vehicles) to operate on the nation's highways. LCVs are limited by federal law to certain areas of the country. Railroads say widespread use of the trucks hauling twin 48 foot trailers or three 28 foot trailers would drive them out of business. Part two investigates the safety record of triple trailer trucks by reviewing state and federal records, interviewing truck drivers and riding in one of the big rigs. Part three investigates the secret war of the railroads against the trucking industry, including creating and funding national "grassroots" advocacy groups to lobby Congress and state officials against triple trailer trucks. Trucking companies and their lobbying association poured million of dollars into an aggressive lobbying effort in support of bigger and heavier trucks.