1. IntelliDrive Research Signal Phase & Timing (SPaT) and Related Messages Edward Fok Office of Technical Service San Francisco

2. Research Goal Define an open interface for two-way communication of traffic signal information between traffic signal controller and a mobile device

3. Purpose of SPaT Traffic signal control information that conveys the current movement state of each active phase in the system will provide the capability for: – Safety applications such as warnings and alerts for crash avoidance – Mobility applications to enable dynamic and efficient traffic management – Environment applications that allow savings in fuel consumption and reduction in CO 2 emissions.

4. Related Messages Map data that conveys the gemetric layout of the associated intersection Positioning data that allows the correlation of the signal and map data

5. SPaT Operation Overview On Board Equipment (OBE) Traffic Control Device Traffic Control Device DSRC radio SPaT Processor Positioning/ GPS Positioning/ GPS Map storage/ GID Map storage/ GID MAP/GID GPSC SPaT

6. Open Interface – Concept Interface to be defined Two-way communication Mobile Equipment SAE J2735 SAE J2735 Traffic Signal Controller Traffic Signal Controller NTCIP 1202 NTCIP 1202 NEMA TS-X 2070 ATC Others

7. Desirable Characteristics Minimize the need for new standard objects, or ideally: no new objects. Traffic Controller standard may reference SAE J2735 SAEJ2735 reference NTCIP 1202 Updates expected for both Standards

8. Process for Development Review of relevant Past and Current research Creation of user forums – Traffic Control Industries – Modal Partners – Vehicle and Tier-1 OEM Concept of Operation Development Prototype Development Finalize Interface

9. Track 5 Track 1 Track 2 Project Mgmnt Rqrmnts Track 3 Track 4 Concept Definition Testing Prototype Finalize Interface Definition CY 2011 1Q2Q3Q4Q CY 2010 1Q2Q3Q4Q Con Ops PMP & SEMP Update Requirements Update Requirements Build Environment for prototype evaluation Develop (2) Prototypes Develop Prototypes with additional vendors Issue SOW Requirements Walkthrough Cap Anal Rsrch/ Lit Rev Contract Award Integrate SPaT with Map, Positioning, & Security Subject Matter Expert Workshop CY 2012 1Q2Q3Q4Q Reqs ConOps Walkthrough Draft Interface Definition Additional Prototype Testing Safety Pilot Model Deployment Review Draft with Standards Stakeholders Test initial Prototypes Signal Phase and Timing Research Roadmap (planned)