Research On Visualization Method Of Highway Pavement Evaluation Index

With the continuous increase of highway mileage in our country,the concept of highway construction has changed from "mainly construction management,equal emphasis on construction and maintenance" to "mainly maintenance management of highways,supplemented by highway construction".As a result,the highway maintenance management industry has become a transportation industry.An important part of the management industry.The road surface evaluation index is the more important indicator in the road maintenance management.The road surface evaluation index is the road surface,subgrade,bridges and culverts,facilities along the road,etc.Collected by the intelligent road inspection vehicle to fully reflect the technical status of the road and the overall service level information data.According to the industry standard proposed by the "Highway Technical Condition Evaluation Standard"(JTG-H20-2018),the maintenance management data includes 12 technical indicators such as the highway technical condition index MQI and the highway pavement performance index PQI.However,the current transportation industry lacks an efficient organization and management method for the road surface evaluation index,at the same time how to realize the visual expression in the transportation information platform,and how to carry out statistics and analysis for the maintenance and management needs.These problems have to a large extent become the main reason for the inefficiency of some transportation departments.Based on the above problems,this paper makes further research on the visualization method of highway pavement evaluation index.The main research contents are as follows:(1)Organization and management of highway pavement evaluation indexRefer to the "Highway Technical Condition Evaluation Standards"(JTG-H20-2018)promulgated by the Ministry of Transport for a detailed discussion on the structure,algorithm formula and scoring rules of the twelve index data of the highway pavement evaluation index.Design the database structure,establish a highway pavement evaluation index database,and efficiently manage the highway pavement evaluation index.(2)Visualization method of highway pavement evaluation indexLinear referencing and dynamic segmentation technology are used to realize the one-to-many integration of vector data and attribute data,and realize the visual expression of multiple attribute information.Introduce vector slicing technology,implement vector data slicing and release based on the map service system deployed locally on Mapbox,and visually render the road evaluation index.(3)Comprehensive statistics and analysis of pavement evaluation indexTake administrative divisions at all levels as a unit,carry out statistics and analysis based on different roads,different indicators,and road pavement evaluations in different periods,which are only indicators,and generate statistical analysis diagrams that can express their meanings,realize their visual expressions,and better serve maintenance decision making.Solve the problem of one-to-many and fast rendering of evaluation index big data.(4)Visual application practice of highway pavement evaluation indexOn the basis of the research of the vector tile technology system,the rendered traffic thematic map is applied to the basic management platform of the highway big data of Liaoning Province,using the flexibility of vector tile rendering and user-defined advantages to realize the basic version.The paper has 36 figures,21 tables,and 59 references.