Passive priority method of tramcar signals under special right of way

Abstract

The invention discloses a passive priority method of tramcar signals under the special right of way. The travel time of a bidirectional tramcar is minimized by regulating the phase difference of intersection signal lamps and the phase sequence of each signal lamp under the condition that the duration of a signal period and the green time ratio are kept unchanged, and the travel time comprises the driving time on road segments and the time for waiting passengers to get on the tramcar at a station. The passive priority method is characterized in that (1) the travel time of the bidirectional tramcar is used as an optimization target, the phase difference and the phase sequence of intersection signal timing are optimized, and the driving speed and the station dwell time of the tramcar on the road segments can be guided according to the phase difference and the phase sequence; (2) the influence to social cars is controlled while the operation of the tramcar is optimized; (3) when the phase sequence is regulated, the conflict between left-turn social cars and the tramcar is avoided. The passive priority method disclosed by the invention has the advantages that the travel time of the tramcar is shortened, the driving safety of the tramcar is ensured, the influence to the social cars is reduced, and the like.

Description

technical field [0001] The invention relates to the technical field of transportation, in particular to a passive prioritization method for tram signals under exclusive right of way. Background technique [0002] With the rapid increase in the number of private cars with low occupancy, urban traffic is facing increasingly serious problems: more frequent traffic congestion seriously affects travel efficiency, and environmental pollution caused by emissions reduces the quality of life. Giving priority to the development of public transportation is one of the important countermeasures to alleviate the above problems. Compared with other public transportation modes, modern trams have the advantages of larger transport capacity, lower investment costs, short construction period, and environmental protection. Therefore, more and more cities are planning to build trams. [0003] How to optimize the signal timing scheme along the line according to the characteristics of tram operat...

AI Technical Summary

Problems solved by technology

[0002] With the rapid increase in the number of private cars with low occupancy, urban traffic is facing increasingly serious problems: more frequent traffic congestion seriously affects travel efficiency, and environmental pollution caused by emissions reduces the quality of life

[0004] 1) Generally, there are multiple routes on the same section of the bus, and the departure frequency is high, so the headway between the buses is small, so the optimization goal of the existing methods is to maximize the green wave bandwidth of the bus; The repetition coefficient of the tram line is small, and the frequency of departure is low, so maximizing the green wave bandwidth of the tram has no practical application value, and it will cause a waste of the green wave bandwidth resource of the tram;

[0005] 2) Tram lanes are mostly arranged in the center of the road and do not share lanes with social vehicles, while traditional buses share lanes with social vehicles

[0008] (1) Active priority control of tram signals requires additional detection equipment, communication equipment and corresponding management systems, which will increase additional costs;

[0009] (2) When the two-way trams apply for priority at the same time, it is difficult to ensure that the two-way trams can pass the intersection with priority;

[0010] (3) Adopting the strategy of prolonging the green light time or turning on the green light early will cause serious delays for social vehicles on the arterial road during peak hours and affect the traffic of social vehicles

[0012] (1) The selected index is not appropriate enough to ensure the minimum travel time of the two-way tram;

[0013] (2) The influence of the layout of the tram lanes is not considered. The tram lanes are mostly arranged in the center of the road, which will conflict with the left-turning social vehicles;

[0014] (3) When the tram lines cannot all be within the green light window, this method needs to adjust the signal period length and green signal ratio, and adjusting the signal cycle length and green signal ratio will destroy the original best cycle time and green signal ratio. ratio, resulting in serious social vehicle delays

[0015] To sum up, there are few existing methods on the passive signal priority of trams. Most of these methods focus on the priority of trams, and need to change the green-signal ratio or cycle length of the signal distribution, and changing the cycle length and green-signal ratio in In peak conditions, it will have a serious impact on social vehicles

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