Traffic Volume Characteristics on Urban Freeways

by Kenneth W. Heathington, (M.ASCE), Asst. Prof. of Civ. Engrg.; Purdue Univ., Lafayette, IN,
Paul R. Tutt, Highway Design Safety Engr.; Texas Highway Dept., Austin, TX,

Serial Information: Transportation Engineering Journal of ASCE, 1971, Vol. 97, Issue 1, Pg. 105-116

Document Type: Journal Paper


Various traffic characteristics for urban freeways are derived from data recorded at 15 urban locations in 1965 and 19 urban locations in 1963. This study was directed toward developing methodology for estimating traffic volumes. Short-time peak volumes are used to estimate volumes of longer duration such as for a 24-hr period. These expansion factors are developed on a directional basis. Other characteristics such as beginning times of peak periods as a function of urban size are examined. Empirical lane distributions on multilane facilities are developed.

Subject Headings: Traffic volume | Urban areas | Highways and roads | Traffic analysis | Empirical equations

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