A Data Model for Guide Sign System and Its Application in Guide Sign Placement

Guide signs are recognized to be one of the most important elements in road facilities. The frequent changes of road network structure and traffic control strategies in urban area promote the need of updating guide sign dynamically and designing a placement solution rapidly. In order to accomplish those requirements, a data model is introduced to describe the guide sign system and the extracting data will be stored in the guide sign database. The data model is composed of five core components: junction, road segment, guide sign location, guide sign panel, and guide sign item. A Point of Interest Oriented Placement Method (POIOPM) is proposed to accomplish the need of designing a placement solution for POI rapidly. Finally, the placement solution to the proposed data model is built on the platform of ArcGIS and C#. It has shown the solution matches the practical guide signs. This indicates the correctness and reliability of the proposed data model.