| Functional Requirements: |
Roadway Signal Priority
- The field element shall respond to signal priority requests from transit vehicles.
Roadway Basic Surveillance
- 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.
- The field element shall collect, process, and send traffic images to the center for further analysis and distribution.
- The field element shall return sensor and CCTV system operational status to the controlling center.
- The field element shall return sensor and CCTV system fault data to the controlling center for repair.
Roadway Environmental Monitoring
- The field element shall include surface and sub-surface environmental sensors that measure road surface temperature, moisture, icing, salinity, and other measures.
- The field element shall include environmental sensors that measure weather conditions including temperature, wind, humidity, precipitation, and visibility.
- The field element's environmental sensors shall be remotely controlled by a maintenance center.
- The field element's environmental sensors shall be remotely controlled by weather service providers such as the National Weather Service or value-added sector specific meteorological services.
- The field element's environmental sensors shall be remotely controlled by a maintenance and construction vehicle.
- The field element shall remotely aggregate environmental sensor data with environmental data collected from maintenance and construction vehicles.
- The field element shall provide weather and road surface condition data to centers.
- The field element shall provide weather and road surface condition data to maintenance and construction vehicles.
Roadway Signal Controls
- The field element shall control traffic signals under center control.
- The field element shall report the current signal control information to the center.
- The field element shall report current preemption status to the center.
- The field element shall return traffic signal controller operational status to the center.
- The field element shall return traffic signal controller fault data to the center.
Roadway Traffic Information Dissemination
- The field element shall include dynamic messages signs for dissemination of traffic and other information to drivers, under center control; the DMS may be either those that display variable text messages, or those that have fixed format display(s) (e.g. vehicle restrictions, or lane open/close).
- The field element shall provide operational status for the driver information systems equipment (DMS, HAR, etc.) to the center.
- The field element shall provide fault data for the driver information systems equipment (DMS, HAR, etc.) to the center for repair.
Standard Rail Crossing
- The field element shall collect and process, traffic sensor data in the vicinity of a highway-rail intersection (HRI).
- The field element shall monitor the status of the highway-rail intersection (HRI) equipment, including both the current state and mode of operation and the current equipment condition, to be forwarded on to the traffic management center.
- The field element shall monitor the status of the highway-rail intersection (HRI) equipment, including both the current state and mode of operation and the current equipment condition, to be forwarded on to the rail wayside equipment.
- The field element shall receive track status from the rail wayside equipment that can be passed on to the traffic management center. This may include the current status of the tracks and whether a train is approaching.
- The field element shall collect pedestrian images and pedestrian sensor data, and respond to pedestrian crossing requests via display, audio signal, or other manner.
- The field element shall close the highway-rail intersection (HRI) when a train is approaching using gates, lights/signs, barriers, and traffic control signals.
- The field element shall support the integrated control of adjacent traffic signals to clear an area in advance of an approaching train and to manage traffic around the intersection.
- The field element shall forward rail traffic advisories received from the Wayside Equipment to the traffic management center.
Roadway Data Collection
- The field element shall collect traffic, road, and environmental conditions information.
- The field element shall include the sensors and supporting roadside devices that sense, collect, and send traffic, road, and environmental conditions information to a center for archival.
- The field element shall collect sensor status and sensor faults from roadside equipment and send it along with the recorded data to a center for archival.
Roadway Work Zone Traffic Control
- The field element shall collect, process, and send work zone images to the center for further analysis and distribution, under center control.
- Under traffic and maintenance center control, the field element shall include driver information systems (such as dynamic messages signs and highway advisory radios) that advise drivers of activity around the work zone through which they are currently passing.
- Under the control of field personnel within maintenance vehicles, the field element shall include driver information systems (such as dynamic messages signs and highway advisory radios) that advise drivers of activity around a work zone through which they are currently passing.
- The field element shall control access to the work zone using automated gate or barrier systems. This includes automated flagger assistance devices that include automated gate arms and other automated gate/barrier systems.
- The field element shall provide operational status for the surveillance (e.g. CCTV), driver information systems, and gates/barriers in work zones to the maintenance center.
- The field element shall provide fault data for the surveillance (e.g. CCTV), driver information systems, and gates/barriers in work zones to the maintenance center for repair.
Roadway Field Device Monitoring
- The field element shall monitor the operational status (state of the device, configuration, and fault data) of connected sensors (such as traffic, infrastructure, environmental, security, speed) and devices (such as highway advisory radio, dynamic message signs, automated roadway treatment systems, barrier and safeguard systems, cameras, traffic signals, ramp meters, short range communications equipment, security surveillance equipment).
- The field element shall send operational status of connected field equipment to the maintenance center.
- The field element shall send collected fault data to the maintenance center for repair.
- The field element shall include a local interface that provides operational status and fault data for connected field equipment to field personnel.
- The field element shall include a local interface that allows field personnel to command diagnostic tests on connected field equipment.
Roadway Signal Preemption
- The field element shall respond to signal preemption requests from emergency vehicles.
|
