A data model for the Integrated Transportation System

Abstract

Transportation systems are indispensable for all the countries around the world. The main concerns of transportation systems are safety, efficiency and reliability. To fulfill those concerns, it is necessary to integrate into one overarching transportation information system. Integrated Transportation System (ITS) was proposed as a future transportation information system and proposed the three layers object model (3LOM) as an architecture of ITS. In 3LOM, the middle layer consists of a data management system. In order to implement the data management system of the middle layer, it is crucial to design an integrated database structure. This paper proposes a four-layer database model of ITS and discusses how to integrate different types of transportation system. The four-layer model includes a general map database, a general transportation system database, a schedule based and non-schedule based transportation system database, and a specific transportation system database.