Review of Expressway Fog Area Induction based on Visual Information Entropy
In order to further study the driving safety issues in foggy areas of expressways with driver visual information entropy as the core,the key problems of visual induction in the fog area are summarized.Firstly,the influence of fog on the traffic system is expounded,and it is clear that the basic reason for the increase of traffic accident rate in conventional fog and mass fog is the decrease of visibility caused by fog.Then,the concept,calculation methods,influencing factors of visual information entropy are elaborated,and representative research achievements in recent years are compared and summarized.Finally,the visual induction of drivers in fog area is classified into"static induction"and"dynamic induction",and the fog areas induction is analyzed by combining the dynamic vision of drivers.Considering the shortcomings of induced fog lamps,future research can be conducted from the following aspects:to establish the visual information entropy model,calculate the visual entropy value in different visibility of fog environment,so as to further obtain the useful information of drivers in different visibility;to work out the appropriate threshold of visual entropy and visual information,which can be a reference for the layout of expressway induced fog lamps.
traffic engineeringvisual entropyexpressway fog areavisual induction
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