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一、概 述 公路通行能力是在一定道路条件和交通条件下,车辆以能够接受的行车速度,单位时间内一条车道或道路某一横断面通过最大车辆数(单位为辆/小时)。 公路通行能力是表示所能承担通过车辆的能力。当公路上实际交通量小于其通行能力时,公路上行驶车辆处于自由行驶状态,车速较高,交通密度较小,车头时距分布规律符合负指数分布,车辆能实行超车;当公路上实际交通量接近或等于其通行能力时,
I. Overview The capacity of a highway is the maximum number of vehicles (units / hour) passing through a lane or a cross section of a road within a unit of time under acceptable road conditions and traffic conditions. Highway capacity is the ability to pass through the vehicle. When the actual traffic volume on the road is less than its capacity, the vehicles traveling on the road are in a free running state with high vehicle speed and small traffic density. The distribution of headway time is in accordance with the negative exponential distribution and the vehicle can overtake. When the actual traffic on the road Close to or equal to its capacity,