Abstract
Traffic congestion is usually caused by the frequent lane changing behaviour of vehicles in the weaving segments, especially in several adjacent weaving segments. In order to solve the problem of weaving congestion, this paper proposes a traffic guidance method based on self-organizing critical state, and designed a Nash equilibrium optimization scheme based on average traffic delay. Then VISSIM software carries on the simulation verification to the actual neighbor weaving segments. First, it validates the induced traffic organization method, keeps each information input consistent, and only changes the induced distance. Through the daily average traffic volume (4092 pcu / h), the traffic volume in the early peak period (5340 pcu / h), the traffic volume in the late peak period (4596 pcu / h) and annual average traffic volume (3276 pcu/h) of the two near neighbor weaving segments in Chongqing. The results show that the optimal lane change constraint distance is 60% of the length of weaving segment, and the corresponding average traffic delays are reduced by 57%, 73%, 63% and 72% respectively. Through the simulation and optimization of the whole day traffic operation, the average delay reduction rate is as high as 84%. The effectiveness of the proposed method is demonstrated by integrating other output file evaluation indexes, which can be used as a reference for future research on self-organizing criticality optimization method of neighbor weaving segments.
Highlights
As an important part of the road system, weaving area affects the traffic efficiency due to the turbulence of traffic flow, which makes it the bottleneck of road traffic [1]
Literature [14] studies the simulation of traffic flow optimization control in weaving section, analyzes the impact of actual traffic capacity on traffic time under different traffic organization schemes, and the results show that the road traffic efficiency is effectively improved
In order to determine the optimal lane change guidance distance, the average traffic delay is selected as the evaluation index, and the equilibrium theory is used to guide the traffic flow in the neighbor weaving segments so that the traffic flow in the weaving area can reach a stable state, and achieve the goal of minimum average traffic delay
Summary
As an important part of the road system, weaving area affects the traffic efficiency due to the turbulence of traffic flow, which makes it the bottleneck of road traffic [1]. Literature [14] studies the simulation of traffic flow optimization control in weaving section, analyzes the impact of actual traffic capacity on traffic time under different traffic organization schemes, and the results show that the road traffic efficiency is effectively improved. The demand will be forced to stop at the exit and wait for other through vehicles to pass, and change lanes to enter the ramp to leave This kind of spontaneous avoidance and optimal choice is the self-organization of traffic flow, and achieve the traffic self-organization of the neighbor weaving segments. In order to determine the optimal lane change guidance distance, the average traffic delay is selected as the evaluation index, and the equilibrium theory is used to guide the traffic flow in the neighbor weaving segments so that the traffic flow in the weaving area can reach a stable state, and achieve the goal of minimum average traffic delay. Where μis the demand mean value of the normal distribution corresponding to the tail normal distribution; σw is the standard deviation of the normal distribution; γ is the standardized coefficient to ensure that the cumulative probability in the interval is 1; see formula (2) for the value of γ
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