Simulation of Reading of Guide Signs to Evaluate the Effect of Foreign Language Insertion in Bilingual Guide Signs on the Behavior of Native Drivers

To increase road safety, the role of Guide Signs cannot be ignored; Therefore, Guide Signs should be designed to be understandable to all users, both Native and Foreign Drivers (International Drivers). One solution is to insert a second language on the Guide Signs for the use of international drivers, but inserting a second language on the Guide Signs will increase the amount of information on the Guide Signs, and this will probably affect the legibility of the Guide Signs and driver behaviors. Therefore, in this study, to evaluate the legibility of Guide signs by adding a foreign language on the signs and to Assessment the Driver Behaviors by using static simulation, Perception-Reaction Time (PRT) has been collected. After reviewing the data and statistical analysis, it is finally shown that the design of Guide Signs and the addition of foreign language (Bilingual Guide Signs) in the Guide Signs is effective in the legibility of the signs as well as the behavior of Native drivers that they are familiar with the main language of the sign. If the foreign language is written separately on the Guide Signs and below the Persian words; Perception-Reaction Time (PRT) of reading signs for native drivers (drivers who are familiar with the original language) does not change significantly, but if the foreign language is placed on the signs with mixed design; Perception-Reaction Time (PRT) of reading signs for native drivers (drivers who Are familiar with the original language) increases significantly. Also, by increasing the number of words from 5 words to more, the difference in reading time of monolingual and bilingual Guide Signs (separate and mixed) for Drivers familiar with the original language, will increase significantly.