Hawaii Statewide ITS Architecture State Home Statewide Home Stakeholders Stakeholders Inventory by Stakeholder Services by Stakeholder Projects by Stakeholder Operational Concepts Inventory Inventory Inventory by Stakeholder Inventory by Entity Services Services Service Package Descriptions Services by Stakeholder Architecture Architecture Interfaces Architecture Flow Descriptions Projects Projects Projects by Stakeholder Resources How to Use Web Site Systems Engineering Analysis Project Documents ITS Architecture ITS Standards Glossary Feedback Element Expanded Functional Requirements: HDOT-HWY Field Devices Functional Area: Roadway Basic Surveillance The field element shall collect, process, digitize, and send traffic sensor data (speed, volume, and occupancy) to the center for further analysis and storage, under center control. The field element shall collect, process, and send traffic images to the center for further analysis and distribution. The field element shall collect, digitize, and send multimodal crossing and high occupancy vehicle (HOV) lane sensor data to the center for further analysis and storage. The field element shall return sensor and CCTV system operational status to the controlling center. The field element shall return sensor and CCTV system fault data to the controlling center for repair. Functional Area: Roadway HOV Control The field element shall include sensors to detect high-occupancy vehicle (HOV) lane usage, under center control. The field element shall include driver information systems to notify users of lane status for lanes that become HOV or High Occupancy Toll (HOT) lanes during certain times of the day on freeways, under center control. The field element shall include freeway control devices, such as ramp signals and mainline metering and other systems associated with freeway operations that control use of HOV lanes, under center control. The field element shall collect a count of vehicle occupants from passing vehicles using field-vehicle communications. The field element shall provide traffic flow measures and information regarding vehicle occupancy (i.e., lane usage) in HOV lanes to the center. The field element shall return operational status for the HOV lane sensors to the controlling center. The field element shall return fault data for the HOV lane sensors to the center for repair. The field element shall include freeway control devices that control use of lanes, under center control. Functional Area: Roadway Incident Detection The field element shall collect, process, and send traffic images to the center for further analysis and distribution. The field element shall remotely process video data and provide an indication of potential incidents to the traffic management center. The field element's video devices shall be remotely controlled by a traffic management center. The field element shall provide operational status and fault data for the incident detection devices to the traffic management center. Functional Area: Roadway Probe Beacons The field element shall communicate with passing vehicles for traffic data link time calculations and send collected data to the controlling center; identification will be removed to ensure anonymity. The field element shall communicate with on-board equipment on passing vehicles to collect current vehicle position, speed, and heading and a record of previous events (e.g., starts and stops, link travel times) that can be used to determine current traffic conditions. The field element shall communicate with on-board equipment on passing vehicles to collect current status information and a record of previous events (e.g., temperature, wiper status, headlight status, traction control system status) that can be used to determine road and surface weather conditions. The field element shall communicate with on-board equipment on passing vehicles to collect vehicle trip information (e.g., origin and destination information, travel times) that can be used to support transportation planning. The field element shall communicate with on-board equipment on passing vehicles to collect a history of precise positioning information that can be used to derive or verify accurate roadway geometry and lane features for use by map update providers. The field element shall aggregate and forward collected probe information to the center. The field element shall provide roadside equipment operational status to the center. The field element shall provide roadside equipment fault indication to the center for repair. Functional Area: Roadway Signal Controls The field element shall control traffic signals under center control. The field element shall respond to pedestrian crossing requests by accommodating the pedestrian crossing. The field element shall provide the capability to notify the traffic management center of pedestrian calls and pedestrian accommodations. The field element shall report the current signal control information to the center. The field element shall report current preemption status to the center. The field element shall return traffic signal controller operational status to the center. The field element shall return traffic signal controller fault data to the center. The field element shall report current transit priority status to the center. Functional Area: Roadway Traffic Information Dissemination The field element shall include dynamic messages signs for dissemination of traffic and other information to drivers, under center control; the DMS may be either those that display variable text messages, or those that have fixed format display(s) (e.g. vehicle restrictions, or lane open/close). The field element shall include driver information systems that communicate directly from a center to the vehicle radio (such as Highway Advisory Radios) for dissemination of traffic and other information to drivers, under center control. The field element shall include pedestrian information systems under center control (e.g. warning pedestrians of a potential hazard, or providing mandatory instructions as to the availability of pedestrian access). The field element shall provide operational status for the driver information systems equipment (DMS, HAR, etc.) to the center. The field element shall provide fault data for the driver information systems equipment (DMS, HAR, etc.) to the center for repair. Functional Area: Roadway Equipment Coordination The field element shall include sensors that provide data and status information to other field element devices, without center control. The field element shall include sensors that receive configuration data from other field element devices, without center control. The field element shall include devices that provide data and status information to other field element devices without center control. The field element shall include devices that receive configuration data from other field element devices, without center control.

The Hawaiian language uses two diacritical markings. The 'okina is a glottal stop; and the kahako is a macron. The State of Hawaii strongly encourages the use of Hawaiian diacritical markings. The National ITS Architecture tool, Turbo Architecture, does not allow for the Hawaiian diacritical markings to be input and as such, customized service package diagrams, operational concepts and other outputs from Turbo are unable to reflect the diacritical markings. To ensure consistency in this ITS Architecture website, no Hawaiian diacritical markings will be used.