Discussion on traffic organization andchannelization design of urban roadintersection1.PrefaceCongestion often occurs,accompanied by a series of traffic problems:road congestionCompared with road sections,intersections form several conflict points due to theflows caused by the diversion of traffic flows in different directions.It is preciselybecome the bottleneck zone of the whole ciry mad As the main node of the roadconditions and taking the traffie flow and flow direetion as the basis,the traffic orderat the intersection is straightening out.the right of way is reasonably allocated,andflow on the high-load interscetion and the scction.Optimizing the traffic flow on theexport has become the increasing attention of many cities,and as an economic methodother hand,sinee thcre arc many factors to he considcred in the channclization oftraffic organization at intersections.different channelization design results may betechnology and norms also focus on "stay"in the application,although a series ofdomestic issued about the intersection design speoifications,Such as "urban rondrelevant intersection design implementation regulations,but in the relevant theoreticalresearch and channelization design system is rarely seen.Therefore,the intersection1.2 Development status of urban intersection formscomplex system,is such a key link,there are five processing forms.That is,no signallight control level intersection node,signal light control level intersection 2 node,extended signal light control level intersection node,plane ring node and1.2.1 Control plane intersections with signal lightspedestrians,they are filly competent to their work.but there are also a lot ofof Parliament in London.It is a painted signal devioe with no lights,and the signal isinstalled.The lamp was changed from red glass to grcen glass.The first traffic lightdid not last long.however,and the poorly designed gas pipe exploded,killing theand Petrovka Street.It was an arrow light made by a German company.Two traffielights with movable "wings".much like railvay signals,were installed on Pushkinzone and asking them to stop and wait in the red zone util they moved to the greenzone.I'raffic lights have improved over the years.In 1926,the world's first automaticto change the traffie lights to flash vellow at night,which greatly reduced the numbercomputer centralized coordination induction control signal system,which marked thegenerally combined with the traffic surveillance system to form a traffic control centerBy the early 1980s,more than 300 cities around the world had traffic coutrol centers.1.2.2 Plane roundaboutCircular intersections are a special form of plane intersections.Circular orthe intersection oircle the island in the same direction,which can nvoid direct crossto environmental protection.The disadvantage is that it covers an area and departs awill gradually decrease,genemlly can only march at the same speed step by step,ifTherefore,in 1963.Britain began to reduce the diameter of roundabout to aboutone-third of the diameter of the tangent circle at the outer edge of the roundabout,and