USE OF CORBA AND OBJECT ORIENTED CONCEPTS IN THE GARY-CHICAGO- MILWAUKEE (GCM) GATEWAY TRAVELER INFORMATION SYSTEM
David A. Zavattero, Wei Wu · Transportation Research Board 82nd Annual MeetingTransportation Research Board · 2003
The Gary-Chicago-Milwaukee (GCM) Corridor is one of the four priority corridors established under the ISTEA legislation of 1991. The Gateway TIS is the core system that facilitates the integration and interoperation of the many Intelligent Transportation Systems in the Corridor. The Gateway TIS collects transportation related information from geographically dispersed agencies of varied natures, validates and fuses the information collected, and disseminates it to interested public and private entities and the general public via Internet and intranet. The foundation for the Gateway architecture is the Common Object Request Broker Architecture (CORBA). CORBA is one of the two NTCIP Center-To-Center (C2C) communication protocols. CORBA supports both Center-to-Center (C2C) communications and internal, distributed object oriented computing. CORBA is rapidly gaining popularity and momentum in the current software engineering trend of object orientation and distributed computing. It is likely that CORBA will become a popular solution to both C2C communication and distributed computing for next generation ITS. The experience of the Gateway TIS in implementing a CORBA based solution for C2C communications and internal computing can provide useful insights to other ITS center systems currently being planned, designed, and implemented. This paper presents a high level view of the system architecture design of the GCM Gateway TIS with a focus on ITS C2C interoperability. The object oriented Gateway external data model and the Gateway Publisher/Subscriber based data collection and distribution are also introduced. The decision to utilize an object oriented Database Management Structure (DBMS) versus a relational DBMS is also discussed