入口匝道低流量下不同比例ACC车辆行驶分析

Driving Analysis of Different Proportions of ACC Vehicles on Expressway On-ramp under Low Traffic Flow

随着智能汽车技术的发展,ACC技术目前已经在车辆中得到广泛应用。高速公路入口匝道的汇入是影响高速公路交通流平稳运行的主要因素,决定了主线和匝道交织区的通行能力。针对ACC车辆与人工驾驶车辆混合通行的交通流,通过SUMO仿真平台建立匝道汇入模型,通过分析匝道汇入处上游和交织区下游的交通流参数,包括流量、平均速度、速度标准差、换道次数、换道率和行程时间,从效率、安全方面分析在匝道汇入场景下混合不同比例ACC车辆的行驶状况影响。研究表明,在主路处于畅通状态,随着ACC车辆混合比率的提高,可以有效地提高道路的通过流量、平均速度等指标,可以增加整体道路的效率、提高安全性;而处于拥堵状态时,仅仅对通过流量有一定的改善。

With the development of intelligent vehicle technology, ACC technology has been widely used in vehicles. The merging of expressway on-ramp is the main factor affecting the smooth operation of traffic flow, which determines the traffic capacity of the main line and ramp merging area. For the mixed traffic flow of ACC vehicles and manual driving vehicles, the ramp entrance model is established through SUMO simulation platform, and the traffic flow parameters upstream of the ramp entrance and downstream of the merging area are analyzed, including traffic flow, average speed, speed standard deviation, lane change times, lane change rate and travel time. The impact of mixing different proportions of ACC vehicles on the driving conditions in the ramp merging scenario is analyzed from the aspects of efficiency and safety. Research shows that when the main road is unblocked, with the increase of ACC vehicle mixing ratio, the traffic flow, average speed and other indicators of the road can be effectively improved, and the efficiency and safety of the overall road can be enhanced. When the traffic on main road is congested, the traffic flow can only be improved to a certain extent.