Planar intersection timing signal timing method of superposed phase

Abstract

The invention discloses a planar intersection timing signal timing method of a superposed phase in the field of urban road traffic control. The method comprises the following steps of: calculating a flow ratio at each entrance in each flow direction; determining a conflict point with larger flow ratio sum in one flow direction as a key conflict point; determining a vehicle flow combination corresponding to the key conflict point as a key vehicle flow group, wherein key vehicle flow groups in two flow directions of an intersection form a key flow chain; calculating cycle time length of the keyflow chain according to a formula; distributing green light time length for a vehicle flow in each flow direction; and finally calculating green light display time length of the vehicle flow in each direction according to the formula and determining a phase superposition scheme. In the method, the scientific and accurate phase superposition scheme can be automatically generated according to a calculated timing result, the saturation of the vehicle flow can be controlled by adjusting parameters in the formula, the saturation of the vehicle flow in each direction is freely set, the cycle time length is adjusted, the preference of a vehicle flow signal in a certain direction is convenient to realize, and the traffic capacity of the intersection and the service level of the vehicle flow are improved.

Description

technical field [0001] The invention relates to a timing signal matching method of a plane cross intersection, which belongs to the field of urban road traffic control. Background technique [0002] At present, the commonly used timing methods of level intersections in China include the Webster method and the method recommended by the Shanghai Engineering Construction Code "Planning and Design Regulations for Urban Road Level Intersections" (hereinafter referred to as the Shanghai Regulation Method); Both timing methods are aimed at the conventional signal phase, that is, the non-superimposed phase, and the green light time of all traffic flows in the same phase starts and ends at the same time; because the unbalanced traffic flow always exists, the defects of these two timing methods It is a waste of green light resources at intersections. Not only that, due to the inherent flaws in the delay estimation formula in Webster's method, when the intersection is crowded, the cycl...

AI Technical Summary

Problems solved by technology

In addition to the inherent defects of the delay estimation formula of Webster's method, the current stacking phase method also has the defect that the design process of the stacking phase scheme is complicated, which hinders the practical application of the stacking phase

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