Equipment Package: Roadway Signal Controls
| Description: |
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. |
| Included In: |
City of Fitchburg Traffic Signals
City of Leominster TrafficSignals
City of Worcester Traffic Signals
Local City/Town Field Equipment
MassDOT - Highway Division Traffic Signals
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| Functional Requirements |
1 -
The field element shall control traffic signals at intersections and on main highways for urban and rural areas, under center control.
2 -
The field element shall collect pedestrian images and pedestrian sensor data, and respond to pedestrian crossing requests via display, audio signal, or other manner.
3 -
The field element shall provide the capability to notify the traffic management center that a pedestrian has requested right-of-way and when the request was or will be granted (request for right-of-way).
4 -
The field element shall monitor operation of traffic signal controllers and report to the center any instances in which the indicator response does not match that expected from the indicator control information.
5 -
The field element shall monitor operation of traffic signal controllers and report to the center any instances in which the indicator response does not match that expected from known indicator preemptions.
6 -
The field element shall return traffic signal controller operational status to the controlling center.
7 -
The field element shall return traffic signal controller fault data to the maintenance center for repair.
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