A real-time optimal control method for regional traffic signals based on vehicle trajectory data

Abstract

The invention discloses a real-time optimization control method for an area traffic signal based on vehicle trajectory data. The method comprises the following steps of (1) setting initial signal timing parameters; (2) acquiring the vehicle trajectory data; (3) extracting travel time; (4) conducting division on signal control sub areas; (5) controlling optimization of the sub area cycle length; (6) optimizing a single intersection green signal ratio; (7) optimizing adjacent intersection phase differences. According to the method, the vehicle trajectory data is adopted as a data source, equipment does not need to be installed on a traffic road network, the source is easy to obtain and rich, the data format is simple and uniform, and the data is convenient to process and reliable in quality.The control can adapt to quick change of the state of a traffic system, global optimization of traffic signal timing parameters is guaranteed, the continuity of state changes of the traffic system isguaranteed, and the implementation efficiency is high.

Description

technical field [0001] The invention relates to a real-time optimization control method for regional traffic signals based on large vehicle track data, belonging to the field of intelligent traffic control systems in traffic engineering. Background technique [0002] The regional traffic signal control method is the main means to alleviate urban traffic congestion and improve urban travel efficiency. At present, the research field of regional traffic signal control is mainly carried out from two aspects: offline system and online system. The off-line regional traffic signal control system takes the regional traffic signal timing parameters as the optimization object, given a specific traffic system operating state condition, and relying on a self-defined traffic flow propagation model, it calculates a group of The operation performance index of the traffic network under the influence of traffic signal timing parameters, so that the optimal traffic signal timing parameters u...

AI Technical Summary

Problems solved by technology

[0003] In the field of regional traffic control research, the off-line optimization method has received more attention in the academic circles, but its practicability is insufficient; the on-line optimization method is beneficial to practical applications, but the relevant practical foreign products are mainly SCOOT and SCATS systems, which are lacking in China. Corresponding practically applicable area traffic control system products

Images