Method for calculating all red time controlled by two-phase signals of road plane intersection

Abstract

The invention discloses a method for calculating an all red time controlled by two-phase signals of a road plane intersection. The method comprises the following steps of: dividing time periods; organizing a traffic survey to obtain key traffic data; analyzing the road traffic data, and dividing a vehicle type; calculating an average body length vhc and a traffic influence coefficient impc of thevehicle type c; calculating the shortest distance de, c that the vehicle must pass in the all red time; calculating the time that each vehicle i passing the shortest distance de, c needs; calculatinga frequency distribution of the time t that the vehicle passing the shortest distance needs; determining a threshold value Fr of a cumulative frequency of the all red time; and calculating the all redtime Rrn, ph. According to the method for calculating the all red time controlled by two-phase signals of a road plane intersection, great differences in a traffic composition and a vehicle speed atdifferent time periods are sufficiently considered; different vehicle types are also considered to be different in the traffic influence, the vehicle speed, the body length and the like, so that actual needs can be met more accurately.

Description

technical field [0001] The invention relates to the technical field of traffic engineering, in particular to a method for calculating full-red time of two-phase signal control at road level intersections. Background technique [0002] Signal control is one of the main technical means in the field of traffic engineering, which plays an important role in alleviating traffic pressure at level intersections, improving service levels and traffic safety. Two-phase signal control is a common form of traffic control, and it is also the basis of multi-phase signal control. Two-phase control is usually used when the traffic volume at the level intersection is relatively low and the turning traffic is not too heavy. For road level intersections with relatively high traffic pressure and serious conflicts between left-turn traffic and oncoming straight traffic, a left-turn phase can be added to the two-phase signal control scheme to form a multi-phase signal control. Therefore, the rel...

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Problems solved by technology

[0006] Considering the shortcomings of the existing signal control full red time calculation methods, and the traffic flow at road level intersections has very complex dynamic changes, which affect the calculation of signal control full red time, from the function and role of signal control full red time How to design a signal control all-red time calculation method that can better respond to the complex and changeable characteristics of traffic flow will be a major reform and progress in this field.

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