Abstract:

To simulate the mixed traffic flow, the paper proposes a cellular automaton model with multiplatform harborstyle bus stops and two lanes. In the model, the rules of vehicles’ moving, lanechanging and stop time are redefined to accord the reality. It also analyzes the statistical characteristics of traffic flow. The effects of bus parking mode, the length of platform, the platform spacing and the bus proportion on traffic flow are studied, respectively. The results show that the multiplatform harbor-style bus stop has many advantages in bus parking, traffic congestion relieving and traffic flow improving. In summary, the model proposed in this paper is valuable for studying the impacts of public transport on urban traffic flow.

Key words: urban traffic, mixed traffic flow, cellular automaton, multiplatform harbor-style bus stop, traffic flow statistical characteristics

摘要：

在NS模型基础上，考虑到公交车进出站的优先权、逐步变速等因素，建立了多站台港湾式公交站混合交通流双车道元胞自动机模型.通过模型模拟，对比分析了单站台和多站台港湾式公交站两种停靠方式的交通流特性，研究了多站台港湾式公交站的站台长度、站台间距以及公交车比例对交通流的影响.结果表明，在公交车密度较大的路段上，设置多站台港湾式公交站并选择适当站台长度、站台间距可以提高车站的处理能力，更有效的缓解由公交站引起的道路拥堵，从而提高道路的通行能力.该模型作为城市现有道路改造时确定公交车站停靠方式及站台长度的参考.

关键词: 城市交通, 混合交通流, 元胞自动机, 多站台港湾式公交站, 交通流统计特征