Interface: Caltrans Maintenance WZ Field Equipment - Rail Grade Wayside Warning Systems
Information Flow Definitions
advisory radio coordination (Planned)
The direct flow of information between field equipment. This includes information used to initialize, configure, and control roadside highway advisory radio including message content and delivery attributes, local message store maintenance requests, control mode commands, status queries, and all other commands and associated parameters that support local monitoring and management of these systems.
dynamic sign coordination (Planned)
The direct flow of information between field equipment. This includes information used to initialize, configure, and control dynamic message signs. This flow can provide message content and delivery attributes, local message store maintenance requests, control mode commands, status queries, and all other commands and associated parameters that support local management of these devices. Current operating status of dynamic message signs is returned.
environmental sensor coordination (Planned)
The direct flow of information between field equipment. This includes configuration and control of environmental sensors and the 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.
field equipment commands (Planned)
System–level control commands issued to field equipment such as reset and remote diagnostics.
field equipment configuration settings (Planned)
Control settings and parameters that are used to configure field equipment.
field equipment software install/upgrade (Planned)
This flow supports installation and update of software residing in ITS roadway equipment. It supports download of the software installation files, including executable code and associated support files.
field equipment status (Planned)
Reports from field equipment (sensors, signals, signs, controllers, etc.) which indicate current operational status.
lane management coordination (Planned)
The direct flow of information between field equipment. This includes information used to configure and control dynamic lane management systems and the status of managed lanes including current operational state, violations, and logged information. This also includes lane usage information including both traditional traffic flow measures and special information associated with managed lanes such as measured passenger occupancies. It also includes the operational status of the lane management equipment.
local priority request coordination (Planned)
The direct flow of information between field equipment. This includes notification of crossing calls from pedestrians and other vulnerable road users and requests for signal prioritization or preemption, and any other request for right–of–way at an intersection. The status of the priority request is also shared. For vulnerable road users, this includes information provided to guide and warn vulnerable road users at crossings including crossing permission status and crossing time remaining.
rail crossing operational status (Planned)
Status of the highway–rail grade crossing equipment including both the current state or mode of operation and the current equipment condition.
reversible lane coordination (Planned)
The direct flow of information between field equipment. This includes control of automated reversible lane configuration and driver information systems and current reversible lane status including the operational status and mode of the reversible lane control equipment.
signal control coordination (Planned)
The direct flow of information between field equipment. This includes configuration and control of traffic signal controllers or field masters. Configuration data and operational status of traffic signal control equipment including operating condition and current indications are returned.
track status (Planned)
Current status of the wayside equipment and notification of an arriving train.
traffic detector coordination (Planned)
The direct flow of information between field equipment. This includes information used to configure and control traffic detector systems such as inductive loop detectors and machine vision sensors Raw and/or processed traffic detector data is returned that allows derivation of traffic flow variables (e.g., speed, volume, and density measures) and associated information (e.g., congestion, potential incidents). This flow includes the traffic data and the operational status of the traffic detectors
video surveillance coordination (Planned)
The direct flow of information between field equipment. This includes information used to configure and control video surveillance systems and the high fidelity, real–time traffic images and associated meta data that are returned.