Standards in the GCM Gateway Traveler Information System David Zavattero, ITS Program Manager 1512 Standards Workshop Elmhurst, IL October 14-15, 2003 3 states IL, IN, WI 150 Miles 16 counties Over 10 M population Over 30 stakeholder agencies DE LEUW, CATHER GATEWAY * GATEWAY TRAVELER INFORMATION INFORMATION SYSTEM GATEWAY TRAVELERTRAVELER INFORMATION SYSTEM SYSTEM 100+ of jurisdictions GCM GATEWAY System Architecture 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 www.gcmtravel.com 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” 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 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 GDOM Location Resolution Based on the LRMS Standard Referencing Methods: Cross Street Mile Post Address Coordinate Ramp Geometry or SegmentID based Types: Point Section Lane Data Collection TMDD MS/ETMCC XML 511- ATIS 7 LRMS IM 1512 1 2 3 4 5 Gateway Use of Standards C2C CORBA 10 10 8/9 IDL GDOM GMOM 6 Gateway Message Oriented Middleware GMOM Defines a Publisher/Subscriber model based data exchange protocol Based on CORBA Event Service Uses a sophisticated Mediator Channel 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 Summary The GCM Gateway TIS is a complex system providing real-time traveler information to the public and agencies in a 3-state metropolitan region. Gateway was developed by applying available standards. The C2C CORBA standard is the basis for integration and interoperability with a wide variety of systems. Gateway will be a primary data source for the Illinois, Wisconsin, and Indiana 511 Systems.