Intelligent Transportation Systems Data Dictionaries and Data Registry Thomas M. Kurihara IEEE ITS Program Manager Standards Activities 17 February 1999

A Growing Demand for Integrated Transportation Systems Increasing Demands: 30% increase in traffic 50% increase in vehicles 6 million crashes per year; 41,000 fatalities Changing demographics Limited Resources: Limited space to build new capacity Financial constraints Environmental impacts / land use concerns Extracted from Lockheed Martin ITS National Architecture Team Outreach Session Presentation, 1998

ITS User Services are the Basis for National ITS Architecture

National Architecture Describes Integration of ITS Infrastructure Components Multi-Modal Traveler Information Electronic Fare Payment Freeway Management Transit Management Traffic Signal Control Electronic Toll RR Grade Crossing Safety Emergency Response Management Incident Management Multi-Modal Traveler Information Freeway Management Transit Management Traffic Signal Control Electronic Toll RR Grade Crossing Safety Emergency Response Management Incident Management Electronic Fare Payment National ITS Architecture

Architecture Subsystems Travelers Vehicles Roadside Centers Commercial Vehicle Administration Planning Vehicle Transit Vehicle Commercial Vehicle Emergency Vehicle Remote Traveler Support Personal Information Access Toll Administration Emergency Management Traffic Management Fleet and Freight Management Transit Management Emissions Management Information Service Provider Roadway Toll Collection Parking Management Commercial Vehicle Check Traffic Management Transit Management

Architecture Subsystems & Interconnects Travelers Vehicles Roadside Centers Wide Area Wireless Communications Vehicle to Vehicle Communications Commercial Vehicle Administration Planning Dedicated Short Range Communications Vehicle Transit Vehicle Commercial Vehicle Emergency Vehicle Remote Traveler Support Personal Information Access Toll Administration Emergency Management Traffic Management Fleet and Freight Management Transit Management Emissions Management Information Service Provider Roadway Toll Collection Parking Management Commercial Vehicle Check Wireline Communications

Roadside SubsystemsVehicle Subsystems Center Subsystems Wide Area Wireless Communications Traveler Subsystems Remote Traveler Support Personal Information Access Information Service Provider Emergency Management Transit Management Planning Vehicle Transit Vehicle Emergency Vehicle Dedicated Short Range Communications Parking Management Traffic Management Roadway - FMC -Metro TOC -Suburban TOC -Small-town TOC* - Metro Fire - Metro PD - Suburban Fire - Suburban Police - Small-town Fire - Metro E CCTV - Loops - Ramp Meters - VMS - Signals - Signal Priority System* -Metro Transit -Suburban Transit - Metropolitan Transit Kiosks - Metro Transit AVL - Suburban Transit AVL* - Metro Traffic - Fastline - RBDS Systems -Metro RTA -Metro University - City Lots - Parking4Cheap Inc. * Indicates future (proposed) system components Wireline Communications Roadway Your Proposed Architecture: Stakeholders

Next Level of Detail Traffic Management Subsystem Transit Management Subsystem traffic information request for traffic information transit system data signal priority status request for signal priority òHigh-level subsystem information exchange òConsiderations for integration

Architecture and Standards Traffic Management Subsystem Transit Management Subsystem traffic information request for traffic information transit system data signal priority status NTCIP Center to Center Traffic Management Data Dictionary Transit Communications Interface Profiles ITS Architecture ITS Standards request for signal priority

Proposed Architecture-Next Level of Detail Traffic Management (Metro TOC) Transit Management (Metro Transit) Roadway Transit Vehicle transit system data signal priority status request for transit signal priority transit vehicle conditions vehicle probe data local signal priority request vehicle probe data vehicle probe data signal control status request for right of way

AVL Project Traffic Management (Metro TOC) Transit Management (Metro Transit) Roadway Transit Vehicle transit system data signal priority status request for transit signal priority transit vehicle conditions vehicle probe data local signal priority request vehicle probe data vehicle probe data signal control status request for right of way

Standard for Data Dictionaries for Intelligent Transportation Systems (IEEE P1489) IEEE Standards Coordinating Committee 32, ITS Data Dictionary / Message Set Template Working Group Sponsor: ITS Joint Program Office, Federal Highway Administration Facilitator: Intelligent Transportation Society of America ITS functional area data/message set standards development »Traffic Management Data Dictionary (TMDD) [Institute of Transportation Engineers (ITE), American Association of State Highway and Transportation Officials (AASHTO)] »Transit Communications Interface Protocol (TCIP) [IEEE, ITE, AASHTO, National Electrical Manufacturers Association (NEMA)] »Advanced Traveler Information Systems (ATIS) Data Dictionary [Society of Automotive Engineers (SAE), AASHTO] »Incident Management / Emergency Service [IEEE, ITE, AASHTO, National Nine-One-One Number Association (NENA)] »Dedicated Short Range Communications (IEEE, American Society for Testing and Materials (ASTM)

ITS DATA DICTIONARIES Mechanism for storing formally described data elements and data concepts, and associated documenting information (“meta data”) Three types: »Application: Implementation-specific application developer’s database of data elements (not in scope for IEEE P1489) »Functional: ITS National Architecture described data flows, e.g., Information Service Provider (ISP) databases of data elements and related concepts (Advanced Traveler Information Systems (ATIS)) »Registry: ITS level database of fully described data elements and related data concepts (All ITS data dictionary contents), ITS message sets, and ITS Data Registry metadata Goal: Interoperable, reusable data; unambiguous data interchange

IEEE P1489 DESIGN CONCEPTS Based upon ISO/IEC 11179, Specification and Standardization of Data Elements Some tailoring to ITS needs, e.g., meta attribute name changes and definition clarifications, specific conventions Extensions based upon ANSI X3.285, Metamodel for the Management of Sharable Data » Entity types (i.e., ISO/IEC ‘object class’) » Properties » Value Domains » Data Element Concepts » ‘Generic Property Domains’ (i.e., ISO/IEC ‘generic data element’) Additional “administrative” meta attributes, e.g., “user”, “view” Includes ITS message sets (ITS Data Registry only) Includes ITS meta attributes (ITS Data Registry only)

Eight Data Concepts Adopted by ITS Value Domain Property Entity Type Data Element Constructs Data Element Concept Generic Property Domain DataElement Data Element Components Bus route node/stop lat/long (degrees/minutes/seconds) Plus, message sets and meta attributes

Meta Attribution Requirements Mandatory (M), same as ISO Optional (O), same as ISO Conditional (C), same as ISO Indicative (I), Dependent upon an “if” condition, of some type; if the “if” condition is true then meta attribute is required

A Little More Detail...

What Does the P1489 Cover? How to describe and document ITS data concepts in ITS data dictionaries (Part 1): »Identifiers (sequential, non-significant, numeric identifier are specified) »Definitions »Relationships, etc. »Specific naming convention »Specific suggested value domains »Specific required representation class terms »Specific ITS classification scheme How to register and improve documentation of data concepts, including message sets and metadata (Part 2)

Naming Convention Entity Type Term, with modifiers (entity): CONSTRUCTION.ROAD Property Term, with modifiers (information of interest): TargetCompletion Representation Class Term: (format & syntax for instance values): date CONSTRUCTION.ROAD_TargetCompletion_date »Proposed design provides for a list of recommended Representation Class Terms and Value Domains; Value Domains includes class word and legal value list (or a rule for creating a legal value list, e.g., from ANSI X3.30)

ITS Data Dictionaries in Pictures ITS Data Registry ITS Functional Area Data Dictionary ITS Implementation Data Dictionary Foreign Data Registry Foreign Data Dictionary

Registrar » ISO/IEC “Registration Authority” Steward » ISO/IEC “Responsible Organization” Submitter » ISO/IEC “Submitting Organization” ITS Registration Roles

Data Registry Views ITS Registrar Relevant Data Dictionaries/ Registries EPA Data Registrar Traffic Management Steward ITS Stewards Traffic Management Registry View ITS Enterprise Data Registry Submitter ITS Registry Roles Relationships

Preferred » ISO/IEC “Standardized” Qualified » ISO/IEC “Certified” Recorded » ISO/IEC “Recorded” Working Draft » ISO/IEC “Incomplete” Deleted » ISO/IEC “Retired” Intermediate administrative status levels ITS Registration Status Levels

ITS Registration Process

IEEE DD/DR IEEE P1489, Part 1 » Balloted, comment resolution in progress » Submit to IEEE Standards Board for endorsement, June 1999 IEEE DD/DR IEEE P1489, Part 2 » Sponsor SCC 32, ITS DD/MST WG Chair position recently filled » Plan to subcontract to a consultant to create draft Part 2, based upon preliminary notes from P1489 Part 1 development, the ITS Data Registry Functional Design Document, and the ITS Data Registry Functional Operating Procedures » ITS DD/MST (P1489/P1488) WG to be reactivated this summer ITS Data Registry Development » ITS Data Registry Functional Design Document completed » ITS Data Registry Functional Operating Procedures completed » April 1999 start date for development anticipated ITS IEEE P1489 Status

Re-activate ITS Interim Data Registrar Function Develop ITS Data Registry Establish a working prototype of ITS Data Registry Activate ITS Data Registry governance groups » ITS Data Registry Configuration Control Committee - Provide technical direction - Resolve technical issues - Progressing data concepts through registration status levels - Approving Data Registry structures, procedures, and formats - Identify authorized users and types of users » ITS Data Registry Board of Directors - Establishes policy - Provides overall direction - Resolves strategic issues - Maintains and manages the Data Registry Business Plan ITS Data Registry Development