Variable-expansion intersection lane

Abstract

The invention discloses a variable-expansion intersection lane. An open mouth is arranged at a place 30 to 100 m away from an intersection on a center line or halving zone and used as a exclusive lane for left-turn vehicles, and meanwhile, all the lanes at outlets of a same direction except an outermost lane are changed as left-turn waiting zones; an original exclusive left-turn entrance lane is provided with a left-turn stop line, and the front part of the original exclusive left-turn entrance lane is changed into a direct entrance lane; an LED display board is arranged at each driving direction of the intersection to control left-turn vehicles to enter or not to enter into the left-turn waiting zones; induction coils are buried beneath the left-turn waiting zones for communication connection with traffic indication signal lamps. According to the invention, exit lanes unoccupied in a short period of time are ingeniously used as temporary left-turn lanes, so the number of lanes for driving-out of vehicles from the intersection is increased in the period when a green light is on, so utilization efficiency during the period when the green light is on can be improved without great reconstruction of civil works, traffic capacity of the signalized intersection is enhanced, and traffic jam at the signalized intersection is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of traffic roads, and in particular relates to a variable widening intersection lane. Background technique [0002] With the rapid motorization of China's traffic in recent years, traffic congestion has become one of the most difficult problems in cities. According to preliminary calculations, the annual loss caused by traffic congestion in Beijing is 12.12 billion yuan, which is equivalent to 3.6% of the total GDP. Most of the delays caused by urban traffic congestion are concentrated at intersections, which is the main cause of urban traffic congestion. Using scientific and effective methods to design and control urban road traffic can effectively improve transportation efficiency, reduce energy consumption and environmental pollution, reduce the incidence of traffic safety accidents, etc., and will generate huge social and economic benefits. [0003] Signal-controlled intersections formed by intersectio...

AI Technical Summary

Problems solved by technology

During a straight-going green light, vehicles with only two straight lanes in the opposite entrance lane can drive out of the intersection; during a certain left-turn green light period, vehicles with only one left-turn lane in the opposite entrance lane can exit the intersection. It can be seen that the number of lanes available for vehicles to drive out of the intersection during a certain green light time is very small, which greatly reduces the utilization efficiency of green light time resources, resulting in low traffic capacity at the intersection

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