Dona Ana County ITS Field Equipment - Roadway Functionality
Subsystem Description
The Roadway Subsystem (RS) includes the equipment distributed on and along the roadway that monitors and controls traffic and monitors and manages the roadway itself. Equipment includes traffic detectors, environmental sensors, traffic signals, highway advisory radios, dynamic message signs, CCTV cameras and video image processing systems, grade crossing warning systems, and freeway ramp metering systems. HOV lane management, reversible lane management functions, and barrier systems that control access to transportation infrastructure such as roadways, bridges and tunnels are also supported. This subsystem also provides the capability for environmental monitoring including sensors that measure road conditions, surface weather, and vehicle emissions. In adverse conditions, automated systems can be used to apply anti-icing materials, disperse fog, etc. Work zone systems including work zone surveillance, traffic control, driver warning, and work crew safety systems are also included. To enhance security, safeguard systems such as blast shields, exhaust systems and other automated and remotely controlled systems to protect transportation infrastructure is also provided. In advanced implementations, this subsystem supports automated vehicle safety systems by safely controlling access to and egress from an Automated Highway System through monitoring of, and communications with, AHS vehicles. Intersection collision avoidance functions are provided by determining the probability of a collision in the intersection and sending appropriate warnings and/or control actions to the approaching vehicles.
Functional Area: Roadway Data Collection
Field elements to collect traffic, road, and environmental conditions information for use in transportation planning, research, and other off-line applications. Includes the sensors, supporting roadside infrastructure, and communications equipment.
| ID | Requirement | Status |
|---|---|---|
| 1 | The field element shall collect traffic, road, and environmental conditions information. | Planned |
| 2 | 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. | Planned |
| 3 | 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. | Planned |
Functional Area: Roadway Environmental Monitoring
Environmental sensors, surface and sub-surface, that collect weather and road surface information. Weather conditions measured include temperature, wind, humidity, precipitation, and visibility. Sensors measure road surface temperature, moisture, icing, salinity, etc.
| ID | Requirement | Status |
|---|---|---|
| 1 | The field element shall include surface and sub-surface environmental sensors that measure road surface temperature, moisture, icing, salinity, and other measures. | Planned |
| 2 | The field element shall include environmental sensors that measure weather conditions including temperature, wind, humidity, precipitation, and visibility. | Planned |
| 3 | The field element's environmental sensors shall be remotely controlled by a maintenance center. | Planned |
| 7 | The field element shall provide environmental sensor equipment operational status to the controlling center or maintenance vehicle. | Planned |
| 8 | The field element shall provide environmental sensor equipment fault indication to the controlling center or maintenance vehicle. | Planned |
| 10 | The field element shall provide weather and road surface condition data to centers. | Planned |
Functional Area: Roadway Field Device Monitoring
Monitors field equipment operational status and detects and reports fault conditions. Device status, configuration, and fault information are provided to a remote center and a user interface provides information locally to field personnel.
| ID | Requirement | Status |
|---|---|---|
| 1 | 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). | Planned |
| 2 | The field element shall send operational status of connected field equipment to the maintenance center. | Planned |
| 3 | The field element shall send collected fault data to the maintenance center for repair. | Planned |
| 4 | The field element shall include a local interface that provides operational status and fault data for connected field equipment to field personnel. | Planned |
| 5 | The field element shall include a local interface that allows field personnel to command diagnostic tests on connected field equipment. | Planned |
Functional Area: Roadway Reversible Lanes
Traffic sensors, surveillance, and automated reversible lane equipment and lane control signals to control traffic in reversible lanes.
| ID | Requirement | Status |
|---|---|---|
| 1 | The field element shall monitor traffic in reversible lanes, including wrong-way vehicles, using sensors and surveillance equipment under center control. | Planned |
| 2 | The field element shall include automated reversible lane equipment and driver information systems (such as lane control signals) that control traffic in reversible lanes on surface streets, under center control. | Planned |
| 3 | The field element shall include automated reversible lane equipment and driver information systems (such as lane control signals) that control traffic in reversible lanes on freeways, under center control. | Planned |
| 4 | The field element shall provide operational status for the reversible lane field equipment to the center. | Planned |
| 5 | The field element shall provide fault data for the reversible lane field equipment to the center. | Planned |