Stacked soft flyover system of crossroad and three-way intersection
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A technology for three-way intersections and crossroads, which is applied in the field of stacked soft interchange systems at intersections and three-way intersections, can solve the problems of complex equipment configuration and high construction investment in the adaptive control system, and achieve the effect of improving traffic emergency transportation capacity and traffic capacity
Inactive Publication Date: 2014-04-02
丁可佳
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Compared with the timing system, the equipment configuration of the adaptive contr
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Embodiment 1
[0019] Example 1: An example of traffic regulation areas at intersections with fewer left-turning vehicles
[0020] A stacking area parallel traffic control method at an intersection, in which stacking areas are set on main paths A, B, C, and D, which are respectively between P4L4, P1L1, P2L2, and P3L3. Through the principle of parallelism, it can quickly, effectively and adaptively reduce the waiting time for left turns, reduce traffic conflicts, and realize arbitrary left turns, right turns, U-turns, etc. The spare areas (E, F, H, G) formed between circular or square areas can be used to set up emergency areas, or to set up flower beds and plant urban greening plants to beautify the environment.
[0021] First, calculate the size of the stacking area, which is calculated based on the fact that there are fewer left-turning vehicles. Assuming that the single-lane waiting length of left-turning vehicles is S=120m, since the stacking area has 4 lanes, the stacking area needs 1...
Embodiment 2
[0034] Example 2: An example of a traffic regulation area at an intersection with many left-turning vehicles
example 2
[0035] The principle of Example 2 is the same as that of Example 1, so it will not be repeated here. Example 2 Change the auxiliary road entering the stack area into 2 lanes, so that vehicles waiting to turn left can line up in 2 separate lanes, or the single lane can share 1 lane with straight-going vehicles, so that the intersection looks like eight arrows and eight hearts, which is more beautiful . Example 2 is mainly used for large intersections with a lot of traffic and a long cycle. Assuming that the waiting length of a single lane in each direction is 240m, the total waiting length of 4 lanes in a certain direction is 240×4=960m, calculated as 6m per vehicle, the total number of waiting vehicles in a certain direction is 160. Assuming that 120 vehicles go straight and 40 vehicles turn left, the length of the stack area is 40 / 4×6=60m. According to the speed of 30km / h through the intersection, that is, 8m / s, it takes 8s to clear the stack area. However, it takes 60s+40s...
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Abstract
The invention discloses a stacked soft flyover system and relates to a stack area arranged at a crossroad and a three-way intersection. A parallel go-through control mode is adopted for stack vehicles and red and green light two-phase control without left and right turn lights is adopted at the same time, so that the waiting time of the vehicles is effectively reduced. The stacked soft flyover system disclosed by the invention belongs to the technical field of traffic control, and a reasonable stack area can be obtained by virtue of quantum chemistry calculation at the same time. Cross roads or three-way intersections in modern cities generally adopt red and green light control, but due to the conflict between left turn vehicles and straight ahead vehicles, the traffic efficiency is reduced. According to the stacked soft flyover system disclosed by the invention, a stack area is reasonably arranged on a main traffic road, and by virtue of the parallel principle, the left turn waiting time can be quickly, effectively and adaptively reduced, the traffic conflicts are reduced and any operations of left turn, right turn and the like can be realized; besides, the stack area also has an emergency area for placing vehicles having an accident. The stacked soft flyover system disclosed by the invention is suitable for each planar intersection in cities. The number of lanes can be increased or reduced according to conditions of intersections. The stacked soft flyover system uses a stack principle and a mode of changing series into parallel to improve the traffic capacity of planar traffic intersections, is suitable for designing intersection soft flyovers of major-major and major-auxiliary roads, and can be used for improving the traffic emergency transport capacity.
Description
technical field [0001] The invention relates to a stacked soft interchange system at intersections and three-forks, belonging to the technical field of traffic control. Background technique [0002] At present, urban traffic control is a very difficult task. Generally speaking, urban traffic control adopts various methods: [0003] (1) Timing control: Traffic control adopts traffic signal light control, and operates according to the pre-set timing plan, and the timing is based on the historical data of traffic volume. It is called single-period timing control if only one timing scheme is used in one day, and multi-period timing control is called multi-period timing control if different timing schemes are used in different periods of the day. A method for determining its optimal timing based on historical traffic data. The most commonly used signal timing methods are: Wilbert method, critical lane method, stop line method, and conflict point method. The timing control meth...
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