华中科技大学学报（自然科学版）2013，Vol.41Issue(3)：122-127,6.
基于速度截断对数正态分布的车队密度离散模型
Platoon density dispersion model based on truncated lognormal distribution of speed
摘要
Abstract
As Pacey's platoon dispersion model assumes the speed following normal distribution spreading from negative to positive infinity, which doesn't properly reflect the real observations, based on field collected data, from the density view, by assuming the speed following truncated lognormal distribution ranging from minimum speed to maximum speed, the platoon dispersion characteristics as it moves down along the road was investigated, and a piecewise density function was developed. Based on the density function, the expected number of cars at the front of the platoon past and the expected number of cars at the rear of the platoon not past a downstream point were derived. Besides, the flow function at downstream intersection was developed. Case study and numerical analysis confirmed the validity of the proposed model.关键词
交通工程/交通流/车队密度离散模型/截断对数正态分布/信号协调控制Key words
traffic engineering/traffic flow/platoon density dispersion model/ truncated lognormal distribution/signal coordination control分类
交通工程引用本文复制引用
巫威眺,沈旅欧,靳文舟..基于速度截断对数正态分布的车队密度离散模型[J].华中科技大学学报（自然科学版）,2013,41(3):122-127,6.基金项目
国家自然科学基金资助项目(61174188). （61174188）
