Elevated road expressway multi-ramp coordinated control system and control method

Abstract

The invention belongs to the intelligent traffic control technical field and relates to an urban expressway multi-ramp coordinated control system and a control method. The control system involves equipment layout, control and induction strategies and software analysis; and a local and coordination combined method is adopted to generate a regulation rate according to a traffic capacity condition atthe dynamic traffic bottleneck of a main line and a traffic flow conservation principle. With the multi-ramp coordinated control schemes of the invention adopted, the traffic demand of all entrance ramps can be balanced, the proportion of short-distance travel of the main line can be decreased, and the traffic efficiency of an expressway network can be increased.

Description

technical field [0001] The invention belongs to the technical field of intelligent traffic control, in particular to a multi-ramp coordinated control system and control method of an elevated expressway. Background technique [0002] Urban expressways mainly serve the mass and rapid traffic in the city, and play a leading role in urban traffic. As the main artery of urban traffic, if the efficiency of expressways is paralyzed due to congestion, the traffic conditions of the entire city will be greatly affected. At present, there are many control methods and theories at home and abroad on how to regulate urban expressway traffic, including on-ramp control, mainline lane opening and closing control, mainline variable speed limit control, etc. Through the practice in various parts of the country, the theoretical operation effect of the on-ramp control of the expressway is the most direct and significant. [0003] Most of the on-ramp control strategies adopted by domestic urb...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of timing control is that it does not consider the time-varying nature of the traffic state, and cannot change the ramp adjustment rate according to the real-time traffic state of the main line; the single-point adaptive control only considers the optimal local control strategy, and does not consider the global optimal; multi-ramp coordinated control requires Considering the coordination between multiple entrance ramps, due to the difficulty in parameter calibration and implementation

At present, a multi-ramp coordinated control and guidance system with good effect has not been built in China

[0004] In addition, the domestic traditional urban expressway ramp control scheme adopts a queuing strategy to allow ramp-inflow vehicles to wait in line on the ramp, and use traffic lights for periodic release, without considering the key issue of elevated ramp slopes

Vehicles parking on ramps of urban elevated expressways with steep slopes will cause a series of problems. For example, novice drivers park and wait on ramps, and they are prone to slipping when the slopes rise, causing traffic accidents and causing greater traffic congestion; Stopping and waiting will increase the fuel consumption and exhaust emissions of the vehicle

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