本文選題：小汽車-卡車異質(zhì)交通流 + 坡道��； 參考：《計(jì)算機(jī)工程與應(yīng)用》2017年19期

【摘要】：研究上坡道時(shí)小汽車和卡車組成的異質(zhì)交通流的特點(diǎn),將卡車分為重車和空車,使用的模型是一個(gè)更為精細(xì)的基于安全駕駛的元胞自動(dòng)機(jī)(CA)模型,并通過(guò)計(jì)算機(jī)數(shù)值模擬分析了不同的坡度和坡道長(zhǎng)度下異質(zhì)交通流的特征。研究得出如下的結(jié)論:上坡道會(huì)明顯改變交通流特征,交通流由之前分散的阻塞帶變化為多個(gè)密集的短阻塞帶,并且主要集中于坡道上和坡道前段,交通擁堵顯著增加,40 m長(zhǎng)的坡道就會(huì)增加近10%的擁堵;低密度情況下,卡車加入會(huì)在一定程度上緩解擁堵,重車緩解的程度更高,高密度情況下,卡車對(duì)于擁堵比例的影響較小;交通流的擁堵比例隨著縱坡度的增大而增大,這說(shuō)明減少縱坡度能夠緩解擁堵;此外,當(dāng)坡道縱坡度一定時(shí),可以通過(guò)適當(dāng)加大坡道長(zhǎng)度而達(dá)到減緩擁堵的效果。
[Abstract]:This paper studies the characteristics of the heterogeneous traffic flow between cars and trucks on the ramp, and divides the trucks into heavy and empty vehicles. The model used is a more elaborate Cellular Automata (CA) model based on safe driving. The characteristics of heterogeneous traffic flow under different slope and ramp length are analyzed by computer numerical simulation. It is concluded that the upper ramp changes the traffic flow characteristics significantly, and the traffic flow changes from the previously dispersed congestion zone to a number of dense short congestion zones, and is mainly concentrated on the ramp and the front section of the ramp. A significant increase in traffic congestion at 40 m long ramps will increase congestion by nearly 10%; in low density cases, truck participation will alleviate congestion to a certain extent, and heavy traffic relief will be higher, and in high density cases, The effect of truck on congestion ratio is small; the proportion of traffic congestion increases with the increase of longitudinal slope, which indicates that reducing longitudinal slope can alleviate congestion; in addition, when the gradient of ramp is constant, the proportion of traffic congestion increases with the increase of longitudinal slope. The effect of reducing congestion can be achieved by properly increasing the ramp length.
【作者單位】： 西南交通大學(xué)交通運(yùn)輸與物流學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(No.51408509)
【分類號(hào)】：U491
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本文編號(hào)：1950154