Traffic control algorithm optimization algorithm for passing efficiency improvement facing different traffic bottleneck sections

Abstract

The invention relates to a traffic control method for passing efficiency improvement facing different traffic bottleneck sections. For a rapid road bottleneck section, division is carried out based on geometrical characteristics; different traffic control methods are employed for different traffic bottleneck types; an optimal control method in a current traffic flow state is determined based on traffic demands of a main road and a ramp; and optimized control on a traffic flow is realized by employing ramp controlling and variable speed-limiting controlling comprehensively. Therefore, defects that various traffic control methods are not targeted and applicability and advantages and disadvantages of different bottleneck types and control principles are not taken into consideration in the prior art can be overcome. Advantages of ramp controlling and variable speed-limiting controlling are realized fully based on a practical measuring traffic flow state. The road passing efficiency is improved by reducing the system passing time in a range of the rapid road section.

Description

technical field [0001] The invention belongs to the technical field of traffic control, and in particular relates to an optimization algorithm of a traffic control algorithm for improving the traffic efficiency of different traffic bottleneck road sections. Background technique [0002] Variable speed limit control and ramp control, as traffic control strategies that are more and more widely used to improve the efficiency of expressway traffic, have different effects on traffic flow operation. Ramp control can effectively prevent the decline in traffic capacity at bottlenecks and maintain the smooth flow of traffic on the main line. The variable speed limit control controls the traffic flow upstream of the bottleneck position, so that the arrival flow at the bottleneck position is always maintained near the traffic capacity without queuing vehicles. Therefore, different optimal control algorithms need to be selected for different bottleneck sections and traffic flow states,...

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is: the selection of existing traffic control strategies is relatively single, lacks pertinence for different bottleneck types and traffic conditions, variable speed limit control may cause small-scale fluctuations in traffic flow and decrease in the passing efficiency of off-ramp vehicles Decline, the ramp control lacks consideration of the local road impact caused by the queuing of vehicles on the ramp

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