Interface: NDOT District 2 Field Equipment - NDOT District 2 Connected Vehicle Roadside Equipment

NDOT District 2 Field Equipment to NDOT District 2 Connected Vehicle Roadside Equipment Interface Diagram

Architecture Flow Definitions

arriving train information  (Planned)  Applicable ITS Standards

Information for a train approaching a highway–rail intersection that may include direction and allow calculation of approximate arrival time and closure duration.

conflict monitor status  (Planned)  Applicable ITS Standards

A control flow that supports failsafe operation in the event that a conflict is detected that requires the RSE to enter a failsafe operating mode.

environmental sensor data  (Planned)  Applicable ITS Standards

Current road conditions (e.g., surface temperature, subsurface temperature, moisture, icing, treatment status) and surface weather conditions (e.g., air temperature, wind speed, precipitation, visibility) as measured and reported by fixed and/or mobile environmental sensors. Operational status of the sensors is also included.

environmental situation data  (Planned)  Applicable ITS Standards

Aggregated and filtered vehicle environmental data collected from vehicle safety and convenience systems including measured air temperature, exterior light status, wiper status, sun sensor status, rain sensor status, traction control status, anti–lock brake status, and other collected vehicle system status and sensor information. This information flow represents the aggregated and filtered environmental data sets that are provided by the RSE to the back office center. Depending on the RSE configuration and implementation, the data set may also include environmental sensor station data collected by the RSE.

intersection control status  (Planned)  Applicable ITS Standards

Status data provided by the traffic signal controller including phase information, alarm status, and priority/preempt status.

intersection infringement info  (Planned)  Applicable ITS Standards

Vehicle path information sent by a vehicle that is violating the stop bar at an intersection. This flow includes the vehicle's position, heading, speed, acceleration, transmission, steering–wheel angle, braking status, size information and trajectory.

intersection status monitoring  (Planned)  Applicable ITS Standards

Current signal phase and timing information for all lanes at a signalized intersection. This flow represents monitoring of communications by a receiver at the intersection to support monitoring for conflicts between actual signal states and RSE communications about those states.

signal priority service request  (Planned)  Applicable ITS Standards

A service request for vehicle priority issued to a traffic signal controller that results in green extension or other accommodation for the priority vehicle, within the current signal timing plan. The request includes the priority level, the desired time and duration of service, and the intended travel path through the intersection. This flow also allows the RSE to cancel a previously issued request for priority.

track status  (Planned)  Applicable ITS Standards

Current status of the wayside equipment and notification of an arriving train.

traffic situation data  (Planned)  Applicable ITS Standards

Current, aggregate traffic data collected from connected vehicles that can be used to supplement or replace information collected by roadside traffic detectors. It includes raw and/or processed reported vehicle speeds, counts, and other derived measures. Raw and/or filtered vehicle control events may also be included to support incident detection.

vehicle signage local data  (Planned)  Applicable ITS Standards

Information provided by adjacent field equipment to support in–vehicle signing of dynamic information that is currently being displayed to passing drivers. This includes the dynamic information (e.g., current signal states, grade crossing information, local traffic and road conditions, detours, advisories, parking availability, etc.) and control parameters that identify the desired timing, duration, and priority of the signage data.