Most studies concentrate on the processing of the information which drivers receive from traffic signs. The level of traffic signs comprehensibility and its susceptibility to the following factors was studied: sign ergonomics text and symbolic messages combination sign coloring. The Study of Traffic Signs Comprehensionĭue to the role of traffic signs as means to influence the road users’ behavior, the problem of the comprehension of traffic signs content is a subject of numerous scientific studies and expert assessments. The increasing use of traffic signs with non-standard content requires answering at least the following general questions:Ģ. Developing intelligent traffic management and control systems also requires an extension of the range of standard road signs currently used. Due to the form of road infrastructure, new solutions often require additional unusual markings (e.g., showing how the infrastructure is used) in the initial period of their use, and these markings are specific to each site. Unusual signs may appear in situations where the use of standard solutions proves to be ineffective or when new, sometimes surprising solutions for road infrastructure users are implemented. This applies especially to non-standard warning signs addressing traffic safety hazards. Therefore, it is extremely important to design road signs ensuring that their understanding is not strongly affected by the aforementioned factors. This also involves the diversity of personal characteristics of road users, their cognitive limitations, different experience, motivation in decision making, etc. Experience also confirms that the degree of road signs comprehensibility (in the sense of supporting decision making in road traffic) varies. Unusual situations in traffic may occur and these require use of non-standard signs or an unusual combination of existing standard signs. However, it should be noted that the range of signs used is constantly expanding. This issue seems to be secondary, as the content of the signs has been regulated for many years by technical standards, and the interpretation of the meaning of the signs is a subject of driver training. Their effectiveness relies on traffic participants receiving the provided information correctly. Proper road markings are one of the elements improving perception of road space and they facilitate decision-making in traffic, with the intention to effectively provide information regarding road hazards. Incorrect perception and interpretation of the road space by drivers and pedestrians are among the reasons for human errors. Apart from improvements in road infrastructure, traffic management and legal regulations, special attention is paid to humans as traffic participants, as numerous studies clearly indicate that over 90% of accidents result from faulty human decisions. Through numerous studies, the mechanism of traffic accidents has been better understood and this creates the possibility of effective reduction of their frequency and effects. However, the increase in the risk of road accidents cannot be specifically attributed to growing mobility. The study found there is a link between personality traits of the driver and the comprehensibility of symbolic regulatory signs.Ĭonstantly increasing automobile mobility of societies results in various negative phenomena, such as road accidents with their severe socio-economic consequences. Higher level of comprehensibility of symbolic and text regulatory signs is shown by older, better educated drivers and professional drivers. Men comprehend the significance of non-standard symbolic regulatory signs better than women. The obtained results indicate that symbolic signs, unlike symbolic and text ones, are much better comprehended by drivers. A total of 369 drivers were tested using a questionnaire to analyze the traffic signs comprehensibility and Five Factor Inventory (NEO-FFI). The relationship between the level of comprehensibility of these signs and personality traits of the drivers was also studied. The aim of this study was to explore the level of comprehensibility of four different types of non-standard signs. The range of signs used is constantly expanding and unusual situations in traffic require use of non-standard signs or an unusual combination of existing standard signs. Proper road markings are elements improving perception of road space. Drivers’ incorrect perception and interpretation of the road space are among reasons for human errors.
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