Study On Signal Control Of City Roads One-way Network

One-way traffic is one of the effective ways to alleviate urban traffic congestion,one-way traffic signal control is the key to insure the effect of its implementation.intersection saturation flow rate is a key parameter to simple point timing signal timing, itsvalue small changes can lead to signal timing large error, so the determination of saturationflow rate is of great significance;at the same time, the area signal coordination control is theassurance of system operation efficiency.So this paper mainly do much research on the twoproblems mentioned above.In this paper, after analysing the main line traffic characteristics of the single-line systemof xi ’an Tang Yan Road before and after,found that after single traffic，the intersectionconflict points decreased significantly, lane number increased,The speed of the car improved,these changes will lead to single lane saturation flow rate increased, the capacity willincreased.In view of the existing calculation method of saturation flow rate to single line. Refer tothe estimation method of Saturation flow rate,and on the basis of the relationship betweenstraight lane number and saturation flow rate,the speed of car and the saturation flow ratemodel, put forward the modified algorithm of single line,after Tang Yanlu and technologyfrom south to north road intersection straight lane saturation flow rate of1719pcu/h, andsurvey for1722pcu/h is very close to the actual values, the results show that the algorithm isreasonable.After analyzing the road traffic characteristics of the system of Close single road,foundthat the signal coordinated control conditions between Arterial Road Coordinate Control ofclose single road and Area Coordinate Control have much similarities,two-way green wavecontrol approach is presented based on the road,two close to phase difference optimizationalgorithm to improve the trunk road system line signal coordination control method,this kindof algorithm is simple and easy to understand,a small amount of calculation,and obviouseffects. by this paper,using Tang Yan Road special system as the background for examples,doAnalysis on the capacity befor single line,after single line with Point control and after single line with signal coordination control of the above mentioned methods,the results show thatwhen the traffic of the system grow, the Traffic capacity is still improved.based on the microscopic traffic simulation software Vissim, this paper raised a concretesimulation method for single line system,and choose four indicators:one-way road travelspeed,the control delay for each entrance lines of every intersection and service level,the fuelconsumption and exhaust emission,which can comprehensively reflect signal controltechnology, economic and environmental benefits.do Analysis on the four indicators beforsingle line,after single line with Point control and after single line with signal coordinationcontrol of the above mentioned methods.And the simulation results are analyzed in detail.provid an intuitive and simple ideas and methods for the signal control benefits evaluationindex system in single system.