Public / Private Transit Vehicles - Transit Vehicle Functionality

Subsystem Description

FWTAransit Vehicle Subsystem (TRVS) resides in a transit vehicle and provides the sensory, processing, storage, and communications functions necessary to support safe and efficient movement of passengers. The types of transit vehicles containing this subsystem include buses, paratransit vehicles, light rail vehicles, other vehicles designed to carry passengers, and supervisory vehicles. The subsystem collects accurate ridership levels and supports electronic fare collection. The subsystem supports a traffic signal prioritization function that communicates with the roadside subsystem to improve on-schedule performance. Automated vehicle location functions enhance the information available to the Transit Management Subsystem enabling more efficient operations. On-board sensors support transit vehicle maintenance. The subsystem supports on-board security and safety monitoring. This monitoring includes transit user or vehicle operator activated alarms (silent or audible), as well as surveillance and sensor equipment. The surveillance equipment includes video (e.g. CCTV cameras), audio systems and/or event recorder systems. The sensor equipment includes threat sensors (e.g. chemical agent, toxic industrial chemical, biological, explosives, and radiological sensors) and object detection sensors (e.g. metal detectors). In addition, the subsystem supports vehicle operator authentication prior to operation of the vehicle and remote vehicle disabling. The subsystem also furnishes travelers with real-time travel information, continuously updated schedules, transfer options, routes, and fares.

Functional Area: On-board Transit Security

On-board video/audio surveillance systems, threat sensors, and object detection sensors to enhance security and safety on-board a transit vehicles. Also includes silent alarms activated by transit user or vehicle operator, operator authentication, and remote vehicle disabling.

ID Requirement Status
1 The transit vehicle shall perform video and audio surveillance inside of transit vehicles and output raw video or audio data for either local monitoring (for processing or direct output to the transit vehicle operator), remote monitoring or for local storage (e.g., in an event recorder). Near-term
7 The transit vehicle shall accept sensor control data to allow remote control of the sensors. Near-term
8 The transit vehicle shall monitor and output surveillance and sensor equipment status and fault indications. Near-term
9 The transit vehicle shall accept emergency inputs from either the transit vehicle operator or a traveler through such interfaces as panic buttons, silent or audible alarms, etc. Near-term
10 The transit vehicle shall output reported emergencies to the center. Near-term
11 The transit vehicle shall receive acknowledgments of the emergency request from the center and output this acknowledgment to the transit vehicle operator or to the travelers. Near-term

Functional Area: On-board Transit Signal Priority

On-board systems request signal priority through short range communication directly with traffic control equipment at the roadside (intersections, ramps, interchanges, etc.).

ID Requirement Status
1 The transit vehicle shall determine the schedule deviation and estimated times of arrival (ETA) at transit stops. Near-term
2 The transit vehicle shall send priority requests to traffic signal controllers at intersections, pedestrian crossings, and multimodal crossings on the roads (surface streets) and freeway (ramp controls) network that enable a transit vehicle schedule deviation to be corrected. Near-term
3 The transit vehicle shall send the schedule deviation data and status of priority requests to the transit vehicle operator and provide the capability for the transit vehicle operator to control the priority system. Near-term
4 The transit vehicle shall prevent a priority request from being sent when the transit vehicle cannot use the priority (e.g., when the transit vehicle makes a passenger stop on the approach to an intersection). Near-term

Functional Area: On-board Transit Trip Monitoring

Support fleet management with automatic vehicle location (AVL) and automated mileage and fuel reporting and auditing.

ID Requirement Status
1 The transit vehicle shall track the current location of the transit vehicle. Near-term
2 The transit vehicle shall support the computation of the location of a transit vehicle using on-board sensors to augment the location determination function. This may include proximity to the transit stops or other known reference points as well as recording trip length. Near-term
3 The transit vehicle shall record transit trip monitoring data including vehicle mileage and fuel usage. Near-term
4 The transit vehicle shall record transit trip monitoring data including operational status information such as doors open/closed, running times, etc. Near-term
5 The transit vehicle shall send the transit vehicle trip monitoring data to center-based trip monitoring functions. Near-term