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The Public Transport Information and Priority System, abbreviated PTIPS, is a computer-based system that brings together information about public transport entities, such as buses. Where applicable, PTIPS can also provide transport vehicles with priority at traffic signals. PTIPS consists of a number of hardware and software components installed on-board buses which wirelessly communicate with a central set of servers. PTIPS also relies on an interface with Sydney Coordinated Adaptive Traffic System (SCATS - to provide the priority feature) and bus/route/timetable data provided by bus organisations and government authorities. PTIPS provides: * Real-time tracking of bus location and status * Traffic light priority for late running buses * Bus/Timetable performance and reliability reports * Real-time Bus arrival information for bus stops ==How PTIPS Works== PTIPS works by combining, on the one hand, schedule and route path information for buses performing timetabled services (as opposed to, say, charter trips), and on the other hand, live location data transmitted by the buses to PTIPS. PTIPS receives XML data files from the public and private bus operators, which contain information relating to planned trips (for example, route paths, trips & schedules, bus stops etc.) Each bus that PTIPS tracks is equipped with a hardware device that records its location via GPS, and transmits it to the central PTIPS servers via the 3G radio communications network. Buses transmit these messages at certain intervals (which are configurable, and which vary depending on what the bus is doing), and also when they pass certain points along their intended route. Apart from GPS location, the transmitted messages also include information about the vehicle and which trip it is doing. With the above information, PTIPS can compare the location of a bus performing a certain trip, at a certain point in time, with where it should be, based on the planned route and timetable data. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Public Transport Information and Priority System」の詳細全文を読む スポンサード リンク
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