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Related Studies on Motor Carriers
 TRB has conducted other major studies dealing with trucking issues. In response to a congressional request in 1982, a TRB committee addressed the issue of what constitutes "reasonable access" of large trucks permitted under the Surface Transportation Assistance Act of 1982 to a designated national network of major trunk roads for heavy-truck travel (Special Report 223: Providing Access for Large Trucks, TRB 1989). A second study was conducted as the result of a proposal selected and partially funded by the TRB Executive Committee because of its importance (Special Report 227: New Trucks for Greater Productivity and Less Road Wear: An Evaluation of the Turner Proposal, TRB 1990, TRB 1990, TRB 1990 ). The committee that carried out this study identified two truck configurations outside the weight and length limits established by federal law that would offer greater productivity without increasing infrastructure or safety costs. These vehicles formed the basis for the configurations recommended in a later TRB report (Special Report 267: Regulation of Weights, Lengths, and Widths of Commercial Motor Vehicles, TRB 2002).
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