| Functional Requirements: |
Advanced 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 determine whether the highway-rail intersection (HRI) is blocked by traffic in the roadway or some other obstruction.
- The field element shall notify the traffic management center and the rail wayside equipment of any intersection blockages, including trapped vehicles or other obstructions.
- 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 and arriving train information 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 when a train is expected and/or how long the crossing will be closed.
- 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 control the dynamic message signs (DMS) in the vicinity of a highway-rail intersection (HRI) to advise drivers, cyclists, and pedestrians of approaching trains.
- The field element shall close the highway-rail intersection (HRI) when a train is approaching with enough time for traffic to safely clear the crossing 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.
- The field element shall provide approaching train advisories using field-vehicle communications to vehicles approaching the grade crossing.
Roadway Basic Surveillance
- The field element shall collect, process, and send traffic images to the center for further analysis and distribution.
- 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 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.
- 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.
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 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.
- The field element's environmental sensors shall be remotely controlled by a maintenance and construction vehicle.
- The field element shall provide environmental sensor equipment operational status to the controlling center or maintenance vehicle.
- The field element shall provide environmental sensor equipment fault indication to the controlling center or maintenance 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 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 the indicator control information.
- 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 return ramp metering controller, mainline meters, and lane control operational status to the controlling center.
- 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 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.
Roadway Signal Controls
- The field element shall control traffic signals at intersections and on main highways for urban and rural areas, under center control.
- 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 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).
- 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.
- 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.
- The field element shall return traffic signal controller operational status to the controlling center.
- The field element shall return traffic signal controller fault data to the maintenance center for repair.
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 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 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 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.
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 receive control information from other field element devices, without center control.
- 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 zone intrusion alert systems), without center control.
- 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.
- 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 information to other field element devices (such as dynamic message signs, traffic controllers on adjacent intersections), without center control.
Roadway Work Zone Safety
- The field element shall include work zone intrusion detection devices that detect when a vehicle has intruded upon the boundary of a work zone, under center control.
- The field element shall include work zone intrusion detection devices that detect when crew workers have crossed the boundary between the work zone and vehicle traffic, under center control.
- The field element shall include work zone intrusion alerting devices that alert crew workers of a work zone emergency or safety issue such as the intrusion of a vehicle into the work zone area or movement of field crew into the travel lanes.
- The field element shall include work zone intrusion alerting devices that notify crew via maintenance vehicles of a work zone emergency or safety issue such as the intrusion of a vehicle into the work zone area or movement of field crew into the travel lanes.
- The field element shall include work zone intrusion alerting devices that alert drivers that they have intruded upon the perimeter of the work zone, or are about to do so; may provide alerts to drivers directly or via in-vehicle signing.
- The field element shall provide operational status for the work zone intrusion detection devices to the maintenance center.
- The field element shall provide fault data for the work zone intrusion detection devices to the maintenance center for repair.
- The field element shall provide operational status for the work zone intrusion alerting devices to the maintenance center.
- The field element shall provide fault data for the work zone intrusion alerting devices to the maintenance center for repair.
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.
|
