Research On Key Technology Of Continuous Traffic Of Urban Arterial Road

Traffic, the fundament of urban development, is the necessary channel for the spatialand temporal transfer for various social and economic activities. The relationship betweentraffic and urban development is mutual promote and mutual restrain. Along with thedevelopment of economic, traffic issues have gradually become the basic obstacle to thecity’s health development, attracted wide attention. So far, many countries have invest lotsof human and material resources to research theoretical model and develop advancedtechnology in traffic filed, also they have been reach many practical significance results.Arterial road is the skeleton lines in the road-network; cars travel on it smooth or notplay an important role in the whole city traffic system. Under such cognition this paper aimto study the continuous traffic in arterial road, which based on the Hubei Province PublicSecurity Bureau research project “study of key technology of city continuous trafficcoordinated control system”, and the mainly study aspects as follows:(1) Due to the complex and varied traffic rules, even under the ideal hypothesisconditions, it is not easy to achieve continuous traffic. By establishing the mathematicaltheoretic model to analysis its feasibility, we conclude two feasible restrictions under thetheoretic basic feasible premise: firstly, the intersection spacing should meet certain laws;secondly, the intersections controlled coordinately require consist timing cycle. Thus, theintersection spacing, organization and signal coordinate control are three key aspects forcontinuous traffic in artery road.(2) To reach a continuous traffic in arterial road in city, coordinate control inintersections is the core method, but the intersection spacing, left-turn traffic and minorroad traffic influence the coordinated control effective badly. Far-leading and one-wayorganization technology could effectively transfer and adjust the traffic flow anddistribution. In the premise that main road traffic pass preferentially, while its intersectingpath has a secondary importance, using far-leading organization technology couldeffectively regulate the traffic direction, reduce the influence caused by the left and minorstraight flow, make them turn into the little effect right-turn flow in main road. And usingthe one-way organization could eliminate the traffic conflict in intersection, regulated wellwhen there is not large flow in minor road or the intersection spacing not appropriate.(3) The design of arterial road coordinated signal control technology using theWebster design thought, which is based on the single intersection signal timing design. Inthe best optimum signal cycle calculation, we made an improvement, still using delay model to determine the value of periodic signal in single intersection, but use the minimumdelay of main direction of arterial road traffic as target to build delay model to formula theoptimal signal; Using the characteristics of critical signal, the green resources can bemaximum utilized, and the initial phase offset can be calculated by the geometric relationin the time-space diagram; Then establish the optimal urban arterial road coordinate signalcontrol synchronization rate model and unequal phase offset calculation to optimize theinitial phase offset, obtain optimal signal control system in arterial road to obtain optimaloperation of overall continuous traffic. Finally, using this improved method and optimizemodel in real road signal design, verifying its validity and practicability.