OKI Regional ITS Architecture

Interface: INDOT Traffic Operations Center - INDOT Field Equipment

Information Flow Definitions

environmental sensor data  (Planned)  Selected Comm Solution

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 sensors control  (Planned)  Selected Comm Solution

Data used to configure and control environmental sensors.

lane management control  (Planned)  Selected Comm Solution

Information used to configure and control dynamic lane management systems.

passive vehicle monitoring control  (Planned)  Selected Comm Solution

Control commands used to control detection systems that rely on infrastructure–based identification of individual vehicles to measure travel times and other related measures by identifying the same vehicle at different points in the network. Related technologies include Bluetooth readers and license plate recognition systems.

passive vehicle monitoring data  (Planned)  Selected Comm Solution

Time stamped identifiers that identify the vehicles that have passed through a detection zone.

rail crossing control data  (Planned)  Selected Comm Solution

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

rail crossing request  (Planned)  Selected Comm Solution

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

rail crossing status  (Planned)  Selected Comm Solution

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

right-of-way request notification  (Planned)  Selected Comm Solution

Notice that a request has occurred for signal prioritization, signal preemption, pedestrian call, multi–modal crossing activation, or other source for right–of–way.

roadway advisory radio data  (Planned)  Selected Comm Solution

Information used to initialize, configure, and control roadside highway advisory radio. 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 remote management of these systems.

roadway advisory radio status  (Planned)  Selected Comm Solution

Current operating status of highway advisory radios.

shoulder management control  (Planned)  Selected Comm Solution

Information used to configure and control systems that allow use of a shoulder as a lane for vehicular traffic.

signal control commands  (Existing)  Selected Comm Solution

Control of traffic signal controllers or field masters including clock synchronization.

signal control device configuration  (Existing)  Selected Comm Solution

Data used to configure traffic signal control equipment including local controllers and system masters.

signal control plans  (Existing)  Selected Comm Solution

Traffic signal timing parameters including minimum green time and interval durations for basic operation and cycle length, splits, offset, phase sequence, etc. for coordinated systems.

signal control status  (Existing)  Selected Comm Solution

Operational and status data of traffic signal control equipment including operating condition and current indications.

signal fault data  (Planned)  Selected Comm Solution

Faults reported by traffic signal control equipment.

signal system configuration  (Existing)  Selected Comm Solution

Data used to configure traffic signal systems including configuring control sections and mode of operation (time based or traffic responsive).

speed monitoring control  (Planned)  Selected Comm Solution

Information used to configure and control automated speed monitoring, speed warning, and speed enforcement systems.

speed monitoring information  (Planned)  Selected Comm Solution

System status including current operational state and logged information including measured speeds, warning messages displayed, and violation records.

traffic detector control  (Existing)  Selected Comm Solution

Information used to configure and control traffic detector systems such as inductive loop detectors and machine vision sensors.

traffic detector data  (Existing)  Selected Comm Solution

Raw and/or processed traffic detector data which 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

traffic metering control  (Planned)  Selected Comm Solution

Control commands and operating parameters for ramp meters, interchange meters, mainline meters, and other systems equipment associated with roadway metering operations.

traffic metering status  (Planned)  Selected Comm Solution

Current operational status and operating parameters for ramp meters, interchange meters, mainline meters and other control equipment associated with roadway metering operations.