Physical Object: ITS Roadway Equipment
Roadway Advanced Rail Crossing
Overview
'Roadway Advanced Rail Crossing' manages highway traffic at highway-rail intersections (HRIs) where operational requirements demand advanced features (e.g., where rail operational speeds are greater than 80 miles per hour). The active warning systems supported by this application include positive barrier systems which preclude entrance into the intersection when the barriers are activated. This application is activated on notification by wayside interface equipment which detects, or communicates with the approaching train. In this application, additional information about the arriving train is also provided by the wayside interface equipment so that the train's direction of travel, its estimated time of arrival, and the estimated duration of closure may be derived. This enhanced information may be conveyed to the driver prior to, or in context with, warning system activation. This application also includes detection capabilities which enable it to detect an entrapped or otherwise immobilized vehicle on the grade crossing and provide an immediate notification to the wayside interface equipment and traffic management.
This functional object is included in the "ITS Roadway Equipment" physical object.
This functional object is included in the following service packages:
This functional object is mapped to the following Functional View PSpecs:
- 1.2.7.1: Process Indicator Output Data for Roads
- 1.6.1.1: Detect Roadway Events
- 1.6.1.2.4: Provide HSR Device Controls
- 1.6.1.4.1: Generate Alerts and Advisories
- 1.6.1.4.3: Report Alerts and Advisories
- 1.6.1.4.4: Report HRI Status on Approach
- 1.6.1.5: Detect HRI Hazards
- 1.6.1.6.1: Close HRI on Detection
- 1.6.1.6.2: Detect Imminent Vehicle/Train Collision
- 1.6.1.7.1: Control Traffic Volume at Active HRI
- 1.6.1.7.2: Close HRI on Command
- 1.6.3.1: Interact with Wayside Systems
- 1.6.3.2: Advise and Protect Train Crews
- 1.6.3.3: Provide ATS Alerts
- 1.6.5.1: Provide Interactive Interface
Requirements
| # | Requirement |
|---|---|
| 01 | The field element shall collect and process, traffic sensor data in the vicinity of an advanced highway-rail intersection (HRI). |
| 02 | The field element shall determine whether the highway-rail intersection (HRI) is blocked by traffic in the roadway or some other obstruction. |
| 03 | The field element shall notify the traffic management center and the rail wayside equipment of any intersection blockages, including trapped vehicles or other obstructions. |
| 04 | The field element shall monitor the status of the advanced 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. |
| 05 | The field element shall monitor the status of the advanced 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. |
| 06 | 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. |
| 07 | The field element shall collect pedestrian images and pedestrian sensor data at advanced rail crossings and respond to pedestrian crossing requests via display, audio signal, or other manner. |
| 08 | The field element shall control the dynamic message signs (DMS) in the vicinity of an advanced highway-rail intersection (HRI) to advise drivers, cyclists, and pedestrians of approaching trains. |
| 09 | 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. |
| 10 | 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 advanced highway-rail intersection (HRI) . |
| 11 | The field element shall forward rail traffic advisories received from the Wayside Equipment at an advanced highway-rail intersection (HRI) to the traffic management center. |
| 12 | The field element shall provide approaching train advisories using field-vehicle communications to vehicles approaching the grade crossing. |
Information Flows
Standards
The following table lists the standards associated with the functional object itself (as opposed to standards associated with an interface).
| Name | Title |
|---|---|
| ITE ATC | Advanced Transportation Controller |
| ITE ATC API | Application Programming Interface Standard for the Advanced Transportation Controller |
| ITE ATC Model 2070 | Model 2070 Controller Standard |
| NEMA TS2 Traffic Controller Assemblies | Traffic Controller Assemblies with NTCIP Requirements |