Operating Speed

The operating speed of a road is the speed at which motor vehicles generally operate on that road.

The precise definition of "operating speed", however, is open to debate. Some sources, such as the AASHTO, have changed their definitions recently to match the common use of the word. In 1994, the AASHTO Green Book defined the operating speed as "the highest overall speed at which a driver can travel on a given highway under favorable weather conditions and under prevailing traffic conditions without at any time exceeding the safe speed as determined by the design speed on a section-by-section basis," a definition which a majority of US states still use. In July 2001, however, the AASHTO revised their definition for the new edition of the Green Book and defined it as "the speed at which drivers are observed operating their vehicles during free-flow conditions."

Read more about Operating Speed:  See Also

Famous quotes containing the words operating and/or speed:

    Many people operate under the assumption that since parenting is a natural adult function, we should instinctively know how to do it—and do it well. The truth is, effective parenting requires study and practice like any other skilled profession. Who would even consider turning an untrained surgeon loose in an operating room? Yet we “operate” on our children every day.
    Louise Hart (20th century)

    The terror of the atom age is not the violence of the new power but the speed of man’s adjustment to it—the speed of his acceptance.
    —E.B. (Elwyn Brooks)