1. Standards in the GCM Gateway Traveler Information System 1512 Standards Workshop Elmhurst, IL October 14-15, 2003 Standards in the GCM Gateway Traveler Information System David Zavattero, ITS Program Manager 1512 Standards Workshop Elmhurst, IL October 14-15, 2003

2. 3 states - IL, IN, WI 16 counties Over 10 M population Over 30 stakeholder agencies 100+ of jurisdictions

3. GCM GATEWAY System Architecture

4. Gateway System Functions REAL-TIME  Data collection  Data validation and fusion  Data distribution Types of Data Sources  Traffic Management Centers  Emergency Dispatch Centers  Weather Sensor Systems  DOTs/Tollway

5. www.gcmtravel.com

6. Implementation with COTS  Programming Languages: Java/C++/html/…  Database Management System: Versant Object-oriented database  OS platforms: UNIX/Windows  C2C and internal Inter-Process Communication: Iona CORBA “Orbs”

7. Gateway C2C Interface Components  Gateway Data Object Model (GDOM) - defines data format  Gateway Message Oriented Middleware (GMOM) - defines data exchange mechanism All defined in CORBA Interface Definition Language

8. Gateway Data Object Model Uses Standards  TMDD – Traffic Management Data Dictionary  MS/ETMC2 – Message Sets for External Traffic Management Center Communication  LRMS – Location Referencing Message Specifications  Southern California Priority Corridor ShowCase Project

9. GDOM Location Resolution Referencing Methods: u Cross Street u Mile Post u Address u Coordinate u Ramp u Geometry or SegmentID based Types: u Point u Section u Lane Based on the LRMS Standard

10. Data Collection 1 2345 10 8/9 7 6 10 GMOM TMDD IM 1512 MS/ETMCC 511- ATIS GDOM IDL LRMS XML C2C CORBA Gateway Use of Standards

11. Gateway Message Oriented Middleware GMOM  Defines a Publisher/Subscriber model based data exchange protocol  Based on CORBA Event Service  Uses a sophisticated Mediator Channel

12. Gateway’s Use of XML  Gateway now publishing real-time data in XML Schema file.  XML data file made available to external users via protected WebPages.  Gateway XML Schema similar to J2354 ATIS standard

13. Summary u The GCM Gateway TIS is a complex system providing real-time traveler information to the public and agencies in a 3-state metropolitan region. u Gateway was developed by applying available standards. u The C2C CORBA standard is the basis for integration and interoperability with a wide variety of systems. u Gateway will be a primary data source for the Illinois, Wisconsin, and Indiana 511 Systems.