Conservation of energy used for transportation is of vital concern to the nation. This report of the Transportation Research Board details the efficiencies of various vehicles and modes for both passengers and freight under various conditions. Modes considered include highway, bus, rail, air, water, bicycle, and pipelines. The potential impacts of alternative energy-conservation options are evaluated, and research needs are identified. 

This report is out of print.  A photocopy can be ordered at URL: https://onlinepubs.trb.org/onlinepubs/out_of_print.htm