Intelligent signal regulation and control method for elevated ramp

Abstract

The invention discloses an intelligent signal regulation and control method for an elevated ramp, and the method comprises the following steps: 1, collection of traffic condition data of a viaduct surface: collecting the real-time traffic flow data of the viaduct surface; 2, comparison of a collected viaduct surface flow and a set flow threshold value: judging that the viaduct surface is in a congested state if the real-time traffic flow exceeds the threshold value, or else, judging that the viaduct surface is not in the congested state; 3, building of an exit cross section; 4, calculation of variable limiting speeds of all upstream segments of the exit cross section and the control rate of each entrance ramp: supposing that the viaduct can be divided into a plurality of road segments, wherein each road segment is provided with an exit ramp, the number of entrance ramps is not limited, TTS is a function of rk(t), wherein k =1, 2,...,K; minimizing TTS, i.e., calculating the combination of rk(t) to enable TTS to be minimum, wherein k=1, 2,...,K; calculating rk(t) through a linear programming method, and obtaining the exit ramp control rate of each ramp, wherein k=1, 2,...,K. The method is simple and effective, is lower in cost, and is good in instantaneity.

Description

technical field [0001] The invention relates to the field of intelligent transportation, in particular to an intelligent signal control method for elevated ramps. Background technique [0002] With the development of social economy and the improvement of people's living standards, more and more people and families choose to travel by car, which has led to worsening urban traffic congestion, especially as urban rapid transit facilities and the main trunk of urban traffic. On the other hand, the elevated roads, which bear most of the traffic in the city, are increasingly congested, which greatly delays the travel time of the public and causes a waste of resources. The quality of elevated road operation directly affects the operation status of the entire urban traffic network and the travel experience of the public. In order to effectively regulate the traffic flow of elevated roads, alleviate the congestion of elevated roads, and optimize the operation status of elevated road...

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