Since 1950, the Highway Capacity Manual has been a standard used in the

planning, design, analysis, and operation of virtually any highway traffic facility

in the United States. It has also been widely used abroad, and has spurred the

development of similar manuals in other countries.

The twin concepts of capacity and level of service have been developed

in the manual, and methodologies have been presented that allow highway

traffic facilities to be designed on a common basis, and allow for the analysis of

operational quality under various...