Interface Definition

environmental conditions   (Planned)  

Current environment conditions (e.g., air temperature, wind speed, surface temperature) as measured by environmental sensors and communicated by supporting field equipment.

 

fault reports   (Planned)  

Reports from field equipment (sensors, signals, signs, controllers, etc.) which indicate current operational status.

 

hri control data   (Planned)  

Data required for HRI information transmitted at railroad grade crossings and within railroad operations.

 

hri request   (Planned)  

A request for highway-rail intersection status or a specific control request intended to modify HRI operation.

 

hri status   (Planned)  

Status of the highway-rail intersection equipment including both the current state or mode of operation and the current equipment condition.

 

sensor and surveillance control   (Planned)  

Information used to configure and control sensor and surveillance systems at the roadside.

 

signal control data   (Existing)  

Information used to configure and control traffic signal systems.

 

signal control status   (Existing)  

Status of surface street signal controls.

 

traffic flow   (Existing)  

Raw and/or processed traffic detector information which allows derivation of traffic flow variables (e.g., speed, volume and density measures).