快速路入口匝道控制适应性研究

通过回顾入口匝道单点控制经典方法的优缺点及适用条件，分析上海典型匝道——江苏路匝道的几何布局、占有率及速度的实测数据．运用微观仿真软件Vissim4．0和VAP（动态控制编程）模块对无控制、定时控制、动态Alinea控制、动态DC控制等控制策略进行仿真评价．实测数据和仿真结果对比分析表明，对快速路入口匝道控制是必要的Alinea单点控制策略优于定时控制、动态DC控制；Alinea单点控制适用于上海快速路入口匝道控制。

Adaptability of Expressway Ramp Metering

Firstly, several representative isolated ramp-metering algorithms are described in this paper, Then, the field data including layout of ramp, occupancy and velocity in Jiangsu Expressway are discussed. Further, this paper implements the selected control strategies such as no-control, pre-timed control, Alinea-control and DC-control in Vissim by using VAP control module. At last, field data and computer simulations shows that it is necessary and urgent to implement ramp-metering, that Alinea algorithm is superior to fixed-time-control and DC-control, and that Alinea algorithm is suitable for ramp metering in Shanghai expressways.