1	Vehicle-to-Infrastructure Research - Track 1 Enabling Technologies Industry Day 2012 Chicago, IL September 26, 2012 Ben McKeever Federal Highway Administration
2	V2I Track 1 – Enabling Technologies Goal – Develop and integrate the infrastructure components necessary to provide the foundation for V2I deployment. Signal Phase and Timing (SPaT) Mapping Positioning Communications Roadside Equipment (RSE) Integrated Prototype
3	Signal Phase and Timing (SPaT) Goal: Develop an interface between signal controllers and RSE to enable 2-way data exchange between vehicles and controllers SPaT Data Signal state by movement Min/max time remaining by movement Exact time remaining in yellow Geometric intersection description (GID) Signal request messages (Emergency vehicle preemption, transit signal priority, etc.) RTCP position correction message Standards to promote interoperability NTCIP 1202 and 1211 SAE J2735
4	SPaT Operation Overview
5	Open Interface – Concept
6	Signal Phase and Timing (SPaT) Interface tested in the Connected Vehicle Highway Testbed (CVHT) at the Turner Fairbank Highway Research Center (TFHRC) Safety Pilot - 12 intersections equipped broadcast the SPaT information Transit apps plan to use data, required a new field for pedestrian detection SPaT data will be logged to facilitate future application development Safety, mobility and environmental V2I applications will need SPaT data
7	Mapping Goal: Collect relevant roadway geometry and attributes data and broadcast it for use in V2I applications. Mapping Data Pavement marking Roadway signs Roadside furniture (poles, cabinets, other potential obstructions) Roadway geometry (e.g. curvature) Mapping Technology LIDAR Aerial Photogrammetry As-built plans/maps Data Fusion Probe Data/crowd sourcing
8	Mapping Findings Vehicle mounted technologies solution (LIDAR) provides the most detailed data for use as a core mapping solution Vehicle mounted technologies solution is relatively costly and requires an investment in resources including skilled personnel and equipment. The other mapping solutions will remain useful for change detection as well as for mapping under certain specific conditions. Collection, preparation, and use of mapping data completed at the TFHRC Testbed May 2012. Three lane-level applications were demonstrated using decimeter-level positioning techniques Lane departure warning Curve speed warning Signal Phase and Timing, at lane-level
9	Positioning Goal: Ascertain which current or near-term positioning technologies can meet requirements of V2I applications Which road? Which lane? Within lane? Two technology platforms for positioning On-board vehicle equipment Infrastructure-based correction messages
10	Positioning Findings Positioning and mapping are closely related Two approaches based on application type V2I relies on absolute positioning solution V2V relies on relative positioning solution Accurate vehicle position at intersection is critical SPaT information is based on a phase to lane assignment Requires lane-level accuracy Testing technologies at the CVHT in early fall Baseline OEM grade GPS Inertial Measurement Units (IMU) GPS code and carrier solutions (correction messages)
11	Communications Goal: To test multiple communication technologies for potential use in V2I applications Quantify capabilities of the technologies against requirements of key V2I applications Gather subject matter expert opinions to select the most promising candidates Dedicated Short Range Communications (DSRC) Cellular 4G/LTE High definition radio Test the technologies in a laboratory field test at CVHT this fall
12	Communications Findings Connected vehicle program will likely utilize multiple technologies Active safety applications to use DSRC mobility and environmental applications to use DSRC and/or cellular (4G/LTE) Deployment of 4G/LTE is limited and dependent on private development DSRC has limited bandwidth and footprint Some wireless communications appear to interfere with GPS signals
13	Roadside Equipment (RSE) Goal: Foster the development of RSE that meets the requirements of the connected vehicle program Current RSE to broadcast and receive using DSRC Modular in both physical and logical architectures Immediate forwarding (e.g. SPaT) Store and replay (mapping data, traffic incident management messages) Connected to backhaul for data logging
14	Roadside Equipment (RSE) 5 vendors participated in prototyping Research qualified products list (rQPL) issued 5/11/12 for use by Safety Pilot Development will continue to refine design based on Safety Pilot results Refinements will be made to incorporate multiple radio chipsets, if warranted
15	Integrated V2I Prototype Comprehensive solution to connected vehicle infrastructure needs Incorporate all parts of Track 1 to work seamlessly to enable V2I applications Comprehensive review of V2I system requirements Integration and testing of a complete infrastructure system. Data flows Information exchange Standards
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