County and Local SPaT Project

Project Description: A generic Signal Phase and Timing (SPaT) project that can be implemented by counties and/or municipalities.

Project Status: On-going

Project Stakeholders:

• County and City Traffic Engineering
• FDOT CO
• Travelers

Project Service Packages:

• VS13: Intersection Safety Warning and Collision Avoidance (County and Local SPaT)
• SU08: Security and Credentials Management (County and Local SPaT)
• SU09: Device Certification and Enrollment (County adn Local SPaT Project)
• SU04: Map Management (County and Local SPaT Project)

Project Information Flows:

Information Flow	Source Element	Destination Element	Status
conflict monitor status	County and Local Field Equipment	County and Local CAV Field Equipment	Planned
device enrollment information	County and Local CAV Field Equipment	FDOT SCMS	Planned
enrollment credentials	FDOT SCMS	County and Local CAV Field Equipment	Planned
intersection control status	County and Local Field Equipment	County and Local CAV Field Equipment	Planned
intersection geometry	CAV-ITS Map Update System	County and Local CAV Field Equipment	Planned
intersection geometry	CAV-ITS Map Update System	County and Local Traffic Control Systems	Planned
intersection safety application info	County and Local Traffic Control Systems	County and Local CAV Field Equipment	Planned
intersection safety application status	County and Local CAV Field Equipment	County and Local Traffic Control Systems	Planned
intersection status monitoring	County and Local CAV Field Equipment	County and Local Field Equipment	Planned
map update notification	County and Local Traffic Control Systems	CAV-ITS Map Update System	Planned
map updates	CAV-ITS Map Update System	County and Local CAV Field Equipment	Planned
map updates	CAV-ITS Map Update System	County and Local Traffic Control Systems	Planned
misbehavior report	County and Local CAV Field Equipment	FDOT SCMS	Planned
security credential revocations	FDOT SCMS	County and Local CAV Field Equipment	Planned
security credentials	FDOT SCMS	County and Local CAV Field Equipment	Planned
security policy and networking information	FDOT SCMS	County and Local CAV Field Equipment	Planned
signal control commands	County and Local Traffic Control Systems	County and Local Field Equipment	Planned
signal control status	County and Local Field Equipment	County and Local Traffic Control Systems	Planned
vehicle location and motion	Vehicles	County and Local CAV Field Equipment	Planned

Project Functional Requirements (Element - Functional Object):

• CAV-ITS Map Update System - Center Map Management
• 4: The Center shall provide intersection geometry updates to Map Update Systems.


• CAV-ITS Map Update System - Map Management
• 18: The Center shall provide intersection geometry updates to Connected Vehicle Roadside Equipment.
• 5: The Center shall provide basemap updates to other Centers.


• County and Local CAV Field Equipment - ITS Security Support
• 1: The ITS Object shall obtain security policy information from the Cooperative Intelligent Transportation System Credentials Management System (CCMS).
• 10: The ITS Object shall maintain cryptographic secret information so that those secrets are accessible only to ITS Security Support, and not to any other Functional Object.
• 11: The ITS Object shall request pseudonymous credentials from the CCMS.
• 12: The ITS Object shall provide messages (that it receives) that indicate potential misbehavior/malfunction to the CCMS.
• 13: The ITS Object shall request permissions from the Center that manages permissions requests.
• 2: The ITS Object shall request enrollment credentials from the CCMS.
• 3: The ITS Object shall obtain the CCMS' trust credentials.
• 4: The ITS Object shall provide a mechanism for on-board applications to digitally sign messages using keys secured by the CCMS' trust authority.
• 5: The ITS Object shall provide a mechanism for on-board applications to authenticate messages secured by the CCMS' trust authority.
• 6: The ITS Object shall provide a mechanism for on-board applications to encrypt messages using keys secured by the CCMS' trust authority.
• 7: The ITS Object shall provide a mechanism for on-board applications to decrypt messages using keys secured by the CCMS' trust authority.
• 8: The ITS Object shall obtain a list of revoked credentials from the CCMS.


• County and Local CAV Field Equipment - RSE Intersection Safety
• 5: The roadway equipment shall send to Connected Vehicles intersection signal timing information in order for the vehicle to determine if it will safely cross the intersection given its current speed and location.
• 7: The field element shall collect current conflict monitor and intersection control data from the traffic signal controller.


• County and Local CAV Field Equipment - RSE Map Management
• 1: The field element shall collect broadcasted vehicle location and motion information.
• 10: The field element shall provide intersection geometry updates to proximate Vehicles.
• 5: The field element shall provide intersection geometry update information to proximate Vehicles.
• 6: The field element shall provide basemap update information to proximate Vehicles.
• 9: The field element shall provide basemap updates to proximate Vehicles.


• County and Local Field Equipment - Roadway Signal Control
• 1: The field element shall control traffic signals under center control.
• 13: The field element shall provide to roadside equipment the intersection geometry and signal phase movement information including phase and timing information, alarm status, and priority/preempt status.
• 14: The field element shall provide data to the Connected Vehicle Roadside Equipment.
• 2: The field element shall respond to pedestrian crossing requests by accommodating the pedestrian crossing.
• 3: The field element shall provide the capability to notify the traffic management center of pedestrian calls and pedestrian accommodations.
• 4: The field element shall report the current signal control information to the center.
• 5: The field element shall report current preemption status to the center.
• 6: The field element shall return traffic signal controller operational status to the center.
• 7: The field element shall return traffic signal controller fault data to the center.
• 9: The field element shall report current intersection signal timing information to roadside equipment for transmission to connected vehicles.


• County and Local Traffic Control Systems - Center Map Management
• 1: The Center shall collect updates to basemaps from Map Update Systems .
• 2: The Center shall collect updates to intersection geometry from Map Update Systems.
• 4: The Center shall provide intersection geometry updates to Map Update Systems.


• County and Local Traffic Control Systems - TMC Intersection Safety
• 1: The center shall provide current intersection safety status information.


• County and Local Traffic Control Systems - TMC Signal Control
• 1: The center shall remotely control traffic signal controllers.
• 10: The center shall adjust signal timing in respond to a signal prioritization, signal preemption, pedestrian call, multi-modal crossing activation, or other requests for right-of-way.
• 2: The center shall accept notifications of pedestrian calls.
• 3: The center shall collect traffic signal controller operational status and compare against the control information sent by the center.
• 4: The center shall collect traffic signal controller fault data from the field.
• 5: The center shall manage (define, store and modify) control plans to coordinate signalized intersections, to be engaged at the direction of center personnel or according to a daily schedule.
• 6: The center shall implement control plans to coordinate signalized intersections based on data from sensors.
• 7: The center shall manage boundaries of the control sections used within the signal system.
• 8: The center shall maintain traffic signal coordination including synchronizing clocks throughout the system.
• 9: The center shall implement control plans to coordinate signalized intersections based on data from sensors and connected vehicles.


• FDOT SCMS - CCMS Authorization
• 1: The Center shall generate credential identifiers using facilities that are independently owned and operated from one another.
• 3: The Center shall verify information received in pseudonym requests.
• 6: The Center shall provide Vehicle pseudonymous credentials in response to valid Vehicle pseudonym requests.
• 9: The Center shall provide Connected Vehicle Roadside Equipment pseudonymous credentials in response to valid Connected Vehicle Roadside Equipment pseudonym requests.


• FDOT SCMS - CCMS Enrollment
• 1: The Center shall provide enrollment credentials in response to valid enrollment requests.
• 2: The Center shall coordinate the distribution of enrollment credentials with other Centers.
• 3: The Center shall verify information received in enrollment requests.


• FDOT SCMS - CCMS Misbehavior Reporting and Action
• 1: The Center shall accept misbehavior reports from ITS Objects.
• 2: The Center shall analyze misbehavior reports.
• 3: The Center shall coordinate misbehavior analysis with other Centers.


• FDOT SCMS - CCMS Provisioning
• 1: The Center shall provide security and regulatory policy information to ITS Objects.
• 2: The Center shall provide its credentials information to ITS Objects.


• FDOT SCMS - CCMS Revocation
• 1: The Center shall place certificates on the revocation list of those certificates that are associated with misbehavior.
• 2: The Center shall provide to ITS Objects a list of credentials whose trust as been revoked.


• Vehicles - ITS Security Support
• 1: The ITS Object shall obtain security policy information from the Cooperative Intelligent Transportation System Credentials Management System (CCMS).
• 10: The ITS Object shall maintain cryptographic secret information so that those secrets are accessible only to ITS Security Support, and not to any other Functional Object.
• 11: The ITS Object shall request pseudonymous credentials from the CCMS.
• 12: The ITS Object shall provide messages (that it receives) that indicate potential misbehavior/malfunction to the CCMS.
• 2: The ITS Object shall request enrollment credentials from the CCMS.
• 3: The ITS Object shall obtain the CCMS' trust credentials.
• 4: The ITS Object shall provide a mechanism for on-board applications to digitally sign messages using keys secured by the CCMS' trust authority.
• 5: The ITS Object shall provide a mechanism for on-board applications to authenticate messages secured by the CCMS' trust authority.
• 6: The ITS Object shall provide a mechanism for on-board applications to encrypt messages using keys secured by the CCMS' trust authority.
• 7: The ITS Object shall provide a mechanism for on-board applications to decrypt messages using keys secured by the CCMS' trust authority.
• 8: The ITS Object shall obtain a list of revoked credentials from the CCMS.
• 9: The ITS Object shall make the list of revoked credentials available to on-board applications.


• Vehicles - Vehicle Control Automation
• 10: The vehicle shall present vehicle control information to the driver in audible or visual forms without impairing the driver's ability to control the vehicle in a safe manner.
• 5: The Vehicle shall provide its location with lane-level accuracy to on-board control automation applications.


• Vehicles - Vehicle Intersection Warning
• 3: The vehicle shall receive intersection signal timing information in order for the vehicle to determine if it will safely cross the intersection given its current location and speed.


• Vehicles - Vehicle Map Management
• 1: The Vehicle shall make basemap, roadway geometry, intersection geometry and parking facility geometry information available to other onboard vehicle applications.
• 10: The Vehicle shall obtain intersection geometry information from Centers.
• 4: The Vehicle shall obtain intersection geometry update information from proximate Connected Vehicle Roadside Equipment.
• 7: The Vehicle shall obtain basemap update information from proximate Connected Vehicle Roadside Equipment.

Standards:

• (None-Data) - Secure Internet (ITS)
• US: Device enrollment - Secure Internet (ITS)
• US: Misbehavior reporting - Secure Internet (ITS)
• US: NTCIP Signal System Masters - SNMPv3/TLS
• US: NTCIP Traffic Signal - SNMPv3/TLS
• US: SAE Basic Safety Messages - WAVE WSMP
• US: SAE Other J2735 - Secure Internet (ITS)
• US: SAE Signal Control Messages - WAVE WSMP
• US: Security Credentials - Secure Internet (ITS)

Project Operational Concepts:

Roles and Responsibilities

• Travelers
• Install and operate invehicle CAV equipment.


• FDOT CO
• Provide SCMS services.


• County and City Traffic Engineering
• Install and maintain traffic signal equipment to provide SPaT to connected vehicle equipment.