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Scroll down to view the service package description, list of elements, responsible agencies (stakeholders), candidate functional areas and requirements, and flows on this diagram.


Service Package Description

This service package provides the central control and monitoring equipment, communication links, and the signal control equipment that support traffic control at signalized intersections. A range of traffic signal control systems are represented by this service package ranging from fixed-schedule control systems to fully traffic responsive systems that dynamically adjust control plans and strategies based on current traffic conditions and priority requests. This service package is generally an intra-jurisdictional package. Systems that achieve coordination across jurisdictions by using a common time base or other strategies that do not require real time coordination would also be represented by this package. Coordination of traffic signal systems using real-time communications is covered in the ATMS07-Regional Traffic Management service package. This service package is consistent with typical traffic signal control systems.

List of Elements on this Diagram
Click on Element Name to go to Element Detail Page.

Element Name Stakeholder
City of Scottsdale TMC City of Scottsdale
City of Scottsdale Traffic Signals City of Scottsdale


List of Stakeholder Elements and Roles on this Diagram
Click on Element Name to go to Page with Element Details.
Click on Functional Area/Role to go to Page with Candidate Functional Requirements.

Stakeholder Element Name Functional Area/Role Functional Area Description
City of Scottsdale City of Scottsdale TMC Collect Traffic Surveillance This equipment package remotely monitors and controls traffic sensors and surveillance (e.g., CCTV) equipment, and collects, processes and stores the collected traffic data. Current traffic information and other real-time transportation information is also collected from other centers. The collected information is provided to traffic operations personnel and made available to other centers.
City of Scottsdale City of Scottsdale TMC TMC Signal Control This equipment package provides the capability for traffic managers to monitor and manage the traffic flow at signalized intersections. This capability includes analyzing and reducing the collected data from traffic surveillance equipment and developing and implementing control plans for signalized intersections. Control plans may be developed and implemented that coordinate signals at many intersections under the domain of a single traffic management subsystem and are responsive to traffic conditions and adapt to support incidents, preemption and priority requests, pedestrian crossing calls, etc.
City of Scottsdale City of Scottsdale TMC Traffic Equipment Maintenance This equipment package monitors the operational status of field equipment and detects failures. It presents field equipment status to Traffic Operations Personnel and reports failures to the Maintenance and Construction Management Subsystem. The equipment package tracks the repair or replacement of the failed equipment. The entire range of ITS field equipment may be monitored by this equipment package including sensors (traffic, infrastructure, environmental, security, speed, etc.) and devices (highway advisory radio, dynamic message signs, automated roadway treatment systems, barrier and safeguard systems, cameras, traffic signals and override equipment, ramp meters, beacons, security surveillance equipment, etc.).
City of Scottsdale City of Scottsdale Traffic Signals Roadway Signal Controls This equipment package includes the field elements that monitor and control signalized intersections. It includes the traffic signal controllers, signal heads, detectors, and other ancillary equipment that supports traffic signal control. It also includes field masters, and equipment that supports communications with a central monitoring and/or control system, as applicable. The communications link supports upload and download of signal timings and other parameters and reporting of current intersection status. This equipment package represents the field equipment used in all levels of traffic signal control from basic actuated systems that operate on fixed timing plans through adaptive systems. It also supports all signalized intersection configurations, including those that accommodate pedestrians.
City of Scottsdale City of Scottsdale Traffic Signals Roadway Equipment Coordination This equipment package supports direct communications between field equipment. It includes field elements that control and send data to other field elements. This includes coordination between remote sensors and field devices (e.g., Dynamic Message Signs) and coordination between the field devices themselves (e.g., direct coordination between traffic controllers that are controlling adjacent intersections.).


List of Flows on this Diagram
Click on Architecture Flow to go to Page with Applicable ITS Standards.

Source Element Architecture Flow Destination Element
City of Scottsdale Traffic Signals traffic flow City of Scottsdale TMC
City of Scottsdale Traffic Signals signal control status City of Scottsdale TMC
City of Scottsdale TMC traffic sensor control City of Scottsdale Traffic Signals
City of Scottsdale TMC signal control commands City of Scottsdale Traffic Signals

Last updated: 06-24-13