Traffic Sign Detection, Assessment And Maintenance Research

Traffic signs are one of the most important safety facilities for roads.They provide road users with various traffic-related information such as road indications,prohibitions,warnings,directions,and road conditions in front,etc.,through specific shapes,colors,symbols,and characters.The technical condition of traffic signs is crucial for road safety.However,at present,there are few studies related to the maintenance of traffic signs in China,especially the relevant in-depth studies.There is still a lack of systematic research on the inspection,detection,assessment and maintenance measures of traffic signs.At the same time,there is no complete management system about road traffic sign.The replacement of traffic signs only depends on the daily experience of the maintenance personnel,which is very unfavorable for the safe and effective management of traffic signs.In this paper,through the study of the constituent materials of traffic signs and the principle of retroreflection of retroreflective film,combined with the traffic sign investigations of the main roads in eight main provinces of Shaoxing,the attenuation model of the retroreflection coefficient of retroreflective film with use time is obtained,and the reflective film of the sign is calculated.Useful life.The inspection content of the traffic signs was put forward,and the contents and methods of the appearance inspection and detection of the traffic signs were proposed.The retro-reflective performance of the traffic signs,the fatigue of the signposts and the weld metal,and the thickness of the anti-corrosion coating of the signposts were proposed.Technical indicators detection method.Using the analytic hierarchy process to propose methods and standards for assessing the status of traffic signs.It analyzes the daily patrols,regular inspections,and special inspections of traffic signs;studies the maintenance of traffic signs;establishes the time limit for the repair or replacement of bans,warning signs,and guide signs when they are damaged;and gives common questions on traffic signs.The way of maintenance and replacement;According to the characteristics of the maintenance of traffic signs,it proposes the traffic organization method for the maintenance of traffic signs.This paper analyzes the components of the road signs production management system for traffic signs,proposes the overall framework of the road traffic sign management database system,describes the functions of the traffic sign list,and proposes the general steps and contents of the traffic sign list collection.Three kinds of traffic signs reflective film replacement management methods,such as the symbol reflective film life expectancy method,the overall replacement method,and the sampling inspection and evaluation method,were proposed,and the advantages and disadvantages of each management method were analyzed for the reference of the maintenance department.