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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.
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