The Highway Capacity Manual (HCM) is a publication of the Transportation Research Board of the National Academies of Science in the United States. It contains concepts, guidelines, and computational procedures for computing the capacity and quality of service of various highway facilities, including freeways, highways, arterial roads, roundabouts, signalized and unsignalized intersections, rural highways, and the effects of mass transit, pedestrians, and bicycles on the performance of these systems.
There have been five editions with improved and updated procedures from 1950 to 2010, and two major updates to the HCM 1985 edition, in 1994 and 1997. The HCM has been a worldwide reference for transportation and traffic engineering scholars and practitioners, and also the base of several country specific capacity manuals.
Read more about Highway Capacity Manual: History
Famous quotes containing the words highway, capacity and/or manual:
“The highway presents an interesting study of American roadside advertising. There are signs that turn like windmills; startling signs that resemble crashed airplanes; signs with glass lettering which blaze forth at night when automobile headlight beams strike them; flashing neon signs; signs painted with professional touch; signs crudely lettered and misspelled.... They extol the virtues of ice creams, shoe creams, cold creams;...”
—For the State of Florida, U.S. public relief program (1935-1943)
“What man or woman of common sense now doubts the intellectual capacity of colored people? Who does not know, that with all our efforts as a nation to crush and annihilate the mind of this portion of our race, we have never yet been able to do it.”
—Angelina Grimké (1805–1879)
“A great deal of unnecessary worry is indulged in by theatregoers trying to understand what Bernard Shaw means. They are not satisfied to listen to a pleasantly written scene in which three or four clever people say clever things, but they need to purse their lips and scowl a little and debate as to whether Shaw meant the lines to be an attack on monogamy as an institution or a plea for manual training in the public school system.”
—Robert Benchley (1889–1945)