IJERPH, Vol. 18, Pages 10976: The Relationship of the Information Quantity of Urban Roadside Traffic Signs and Drivers` Visibility Based on Information Transmission (International Journal of Environmental Research and Public Health)

For the lack of quantitative basis of traffic sign combination information, this paper established a model of information quantity of urban road traffic signs by analyzing the driver`s information processing and the visual recognition of traffic signs combined with theories of informatics. It used various analytical methods to build a model of the relationship between the traffic sign information quantity (TSIQ) and the driver`s visual recognition. Based on factors, the relationship between the TSIQ and the driver`s visual recognition was studied and analyzed to provide a reference for the design of urban traffic sign layout information. The results show that the TSIQ can explain 61% of the driver`s recognition time (DRT). The more information the road traffic sign conveys, the longer DRT will be. The TSIQ`s threshold is 642 bits, and exceeding this value will cause information overload. Different influence factors have a certain impact on drivers` visual recognition distance (VRD). The male VRD is shorter than the female. The VRD of the young driver is larger than the old driver. The VRD of a novice driver is longer than an experienced driver, while the visual recognition sign of an experienced driver is shorter.