The Research Of Guide Sign System Designing In The Connecting Area Of Highway And Urban Road

The rapid development of the city brings the constant expansion of city layout inrecent years, and the urban road network becomes more and more complicated. So theconnecting layout of highway and road is changed. There are many problems of guidesign in the area，and they affect the driving people in and out of the city. But as thesubsidiary set up of the road, it’s not due importance as the principal part of the project.It is an important part of direction sign system, and it is the most important which thedrivers that general entry and exiting concern.How to design the guide sign in the connection area in order to give full play to theresult in the city traffic, have already become traffic workers’ important researchcontents. This text is on the basis of analyzing that the domestic and foreign researchcurrent situation on the guide sign,use the basic specialized theory such as engineeringof traffic, cognitive psychology, system engineering, give a main service for the driverswho are not familiar with the around road, and consideration to the persons who go out.So it is a systematic research about the setting and parameters of guide signs in theconnection area.First of all, the connection area would be defined base on the functioncharacteristics of highway and urban road. And lay the foundation for designing ofguide sign by analysis of its function characteristics, traffic flow characteristics, layout.The second, it analysis the domestic problem from the guide sign in the connection areaat present, and makes several principles to place the guide sign. Then analyze thepersons’ information demand under different conditions. According the different trafficflow characteristics of all levels of roads, divided into the flag set of nodes and setmethods in the connection area. The third, people’s visual cognition characteristic andthe cognitive process of sign should be analysis by introducing the knowledge ofcognitive psychology. Then, study of the cognitive process of guide sign system basedon cognitive map theory. Mathematical logic be used in the driver’s visual model, aformula is derived to calculate the Settings of the front position and the text height ofthe guide sign design parameters. Research the threshold of guide sign information bycombining with the traffic flow property of the cohesive zone and the characteristics ofthe driver. At last, combining with the guide sign design of Nanjing in Jiangsu province, put forward the corresponding optimization design and layout optimization example.