摘要
随着我国城镇化、机动化进程的不断加快,交通拥堵已经成为几乎所有中国大型城市功能正常运转的障碍。山地城市受限于地形条件,其道路交通尤为复杂,在交通运行上具体表现为:次支路网连通性差,路网流量不均衡,立交节点交通拥堵常态化。对于重庆等山地城市来讲,立交形式选择尤为重要,不仅要做到功能与等级相匹配,同时,还要考虑到对环境等方面的影响。在传统的非饱和流状态下,立交节点形式优劣的评价标准一般以效率优先为主,而对于商圈周围等拥堵"常态化"区域,交通运行常常处于饱和流状态,有必要通过信号控制等方式"截流分压",实现对整个区域的交通流量控制。
With the rapid development of urbanlization and motorization, the traffic jam has almost been the operation obstacle of every city in China. But as for the mountainous cities, the traffic is always more complicated because of its complex terrain, such as, the poor road network connectivity, the unbalanced traffic network, and the traffic congestion normalization of interchange. So it is far more important for the form selection of interchange, which must match the function and grade, and assess the impact on the environment. For the trading area whose traffic congestion is normalized, the traffic is often in a saturated state. At this time, the capacity of the interchange is not better to be more, but it is necessary for signal control to ＂stop the flow and disperse the pressure＂.
出处
《交通科技与经济》
2017年第4期20-25,80,共7页
Technology & Economy in Areas of Communications
关键词
立交选型
饱和流
山地城市交通
交通功能
interchange type
saturation flow
traffic in mountainous city
traffic performance
