Orange County Signal Upgrades

Project Description: This project would upgrade countywide signal controllers with ATC and associated communication switches.

Project Status: Planned

Project Stakeholders:

• Orange County

Project Service Packages:

• TM03: Traffic Signal Control (Orange County)

Project Information Flows:

Information Flow	Source Element	Destination Element	Status
signal control commands	Orange County TMC	Orange County Field Equipment	Planned
signal control device configuration	Orange County TMC	Orange County Field Equipment	Planned
signal control plans	Orange County TMC	Orange County Field Equipment	Planned
signal control status	Orange County Field Equipment	Orange County TMC	Planned
signal fault data	Orange County Field Equipment	Orange County TMC	Planned
signal system configuration	Orange County TMC	Orange County Field Equipment	Planned
traffic detector control	Orange County TMC	Orange County Field Equipment	Planned
traffic detector data	Orange County Field Equipment	Orange County TMC	Planned

Project Functional Requirements (Element - Functional Object):

• Orange County Field Equipment - Roadway Basic Surveillance
• 1: The field element shall collect, process, digitize, and send traffic sensor data (speed, volume, and occupancy) to the center for further analysis and storage, under center control.
• 2: The field element shall collect, process, and send traffic images to the center for further analysis and distribution.


• Orange County Field Equipment - Roadway Signal Control
• 1: The field element shall control traffic signals under center control.
• 4: The field element shall report the current signal control information 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.


• Orange County TMC - TMC Basic Surveillance
• 1: The center shall monitor, analyze, and store traffic sensor data (speed, volume, occupancy) collected from field elements under remote control of the center.
• 2: The center shall monitor, analyze, and distribute traffic images from CCTV systems under remote control of the center.
• 9: The center shall monitor, analyze, and identify wrong way vehicle entries received from sensor data under remote control of the center.


• Orange County TMC - TMC Signal Control
• 1: The center shall remotely control traffic signal controllers.
• 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.

Standards:

• US: NTCIP Signal System Masters - SNMPv3/TLS
• US: NTCIP Traffic Signal - SNMPv3/TLS
• US: NTCIP Transportation Sensors - SNMPv3/TLS

Project Operational Concepts:

Roles and Responsibilities

• Orange County
• Obtain traffic images and traffic flow data from CCTVs and field sensors, and maintain operational control of its own field equipment.
• Operate traffic signal systems, including CCTVs, signals, and sensors, for Orange County.