| Functional Requirements: |
Roadway Basic Surveillance
- The field element shall collect, digitize, and send multimodal crossing and high occupancy vehicle (HOV) lane sensor data to the center for further analysis and storage.
- The field element shall collect, process, and send traffic images to the center for further analysis and distribution.
- 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 return sensor and CCTV system fault data to the controlling center for repair.
- The field element shall return sensor and CCTV system operational status to the controlling center.
Roadway Environmental Monitoring
- The field element shall include environmental sensors that measure weather conditions including temperature, wind, humidity, precipitation, and visibility.
- 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 provide environmental sensor equipment fault indication to the controlling center or maintenance vehicle.
- The field element shall provide environmental sensor equipment operational status to the controlling center or maintenance vehicle.
- 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.
- The field element shall remotely aggregate environmental sensor data with environmental data collected from maintenance and construction vehicles.
- The field element's environmental sensors shall be remotely controlled by a maintenance and construction vehicle.
- 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 a traffic management 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.
Roadway Freeway Control
- The field element shall include ramp metering controllers, mainline meters, and lane controls for use on freeways, under center control.
- The field element shall monitor operation of ramp meter, mainline meters, and lane control indicators and report to the center any instances in which the indicator response does not match that expected from known indicator preemptions.
- The field element shall monitor operation of ramp meter, mainline meters, and lane control indicators and report to the center any instances in which the indicator response does not match that expected from the indicator control information.
- The field element shall provide indications to the driver that a freeway ramp or a lane is available for use, with possible usage data for the freeway lanes they are entering.
- The field element shall return ramp metering controller, mainline meters, and lane control fault data to the maintenance center for repair.
- The field element shall return ramp metering controller, mainline meters, and lane control operational status to the controlling center.
Roadway Traffic Information Dissemination
- The field element shall include driver information systems that communicate directly from a center to the vehicle radio (such as Highway Advisory Radios) for dissemination of traffic and other information to drivers, under center control.
- 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. v
- The field element shall include pedestrian information systems under center control (e.g. warning pedestrians of a potential hazard, or providing mandatory instructions as to the availability of pedestrian access).
- The field element shall provide fault data for the driver information systems equipment (DMS, HAR, etc.) to the center for repair.
- The field element shall provide operational status for the driver information systems equipment (DMS, HAR, etc.) to the center.
Roadway Equipment Coordination
- The field element shall include devices (such as arterial or freeway controllers, roadway automated treatment systems, barrier and safeguard systems, emissions or pollution systems, and work zone intrusion alert systems) that provide data and status infor
- The field element shall include devices (such as arterial or freeway controllers, roadway automated treatment systems, barrier and safeguard systems, emissions or pollution systems, and work zone intrusion alert systems) that receive control information f
- The field element shall include sensors (such as traffic, environmental, and work zone intrusion detection sensors) that provide data and status information to other field element devices (such as dynamic message signs, ramp meters, traffic signals, work
- The field element shall include sensors (such as traffic, environmental, and work zone intrusion detection sensors) that receive control information from other field element devices, without center control.
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.
- 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 fault data for the surveillance (e.g. CCTV), driver information systems, and gates/barriers in work zones to the maintenance center for repair.
- 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.
- 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
- 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 pas
Field Barrier System Control
- The field element shall activate barrier systems for transportation facilities and infrastructure under center control. Barrier systems include automated or remotely controlled gates, barriers and other systems that manage entry to roadways.
- The field element shall communicate access permission status and access instructions to approaching vehicles using field-vehicle communications.
- The field element shall grant access only to qualified vehicles.
- The field element shall receive requests for access from approaching vehicles using field-vehicle communications and validate and authenticate the requests.
- The field element shall return barrier system fault data to the maintenance center for repair.
- The field element shall return barrier system operational status to the controlling center.
Roadway Field Device Monitoring
- The field element shall include a local interface that allows field personnel to command diagnostic tests on connected field equipment.
- 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 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
- The field element shall send collected fault data to the maintenance center for repair.
- The field element shall send operational status of connected field equipment to the maintenance center.
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