Under Road Network Environment Road Traffic Sign Optimization

In recent years, the road construction development was very fast, however, because the construction initial period of the traffic sign design work, reasons insufficiently and tightness of money, after causing the path was open to traffic, the traffic sign cannot be very good satisfied driver's journey demand. The main performance is: The driver walks more and goes astray the road. From solution actual problem's angle embarking, analysis the traffic sign existence's question and carried on the optimization design of the traffic signal to our country road net environment, to our country traffic signal optimization design work and the traffic sign standard's revision has the vital practical significance.The paper in applies to the domestic and foreign traffic sign and is related the standard development present situation to carry on the foundation which the induction summarizes, synthesis application traffic engineering, transportation psychology, systems engineering theory and information theory specialized and related discipline basic theory and method, takes the driver not be familiar with periphery road network's as artificial design object, carries on the optimization design to the traffic sign.First, on the foundation of summarizes in the predecessor research results, it gained the traffic sign information overload threshold value through the simple experiment's way; application of information theory and recognizes psychology, it obtains the road section traffic sign information overload threshold value. Next, for convenience traffic sign optimization design, in carries on dividing the node rank of the road net and referring to classify the road information, it proposes"the node optimization designs primarily, the road section optimization design as auxiliary"to the methods of road net traffic sign optimization design. And, the node according to the advance notification, informs, the confirmation third-level symbol to carry on the optimization design. The road section traffic sign proposed the public welfare traffic sign optimization design method. In view of circles the city highway's particularity, referring to the road information to divide into the information of ring outside and the information of ring inside, and referring to the road information graduation, basically solved the question that the driver walked more and gone astray on the city highway, achieved the goal of the city highway traffic sign optimization design. Finally, in view of the design practice work existence's question, proposed solves the question method using the software. The software has completed the traffic signal cartography function, the traffic signal structural design partial functions and the cartography function initially.