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Traffic signal preemption

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Traffic signal preemption (also called traffic signal prioritisation) is a system that allows an operator to override the normal operation of traffic lights. The most common use of these systems manipulates traffic signals in the path of an emergency vehicle, halting conflicting traffic and allowing the emergency vehicle right-of-way, thereby reducing response times and enhancing traffic safety.

Traffic lightTraffic lightSignalling device to control competing flows of trafficAn LED 50-watt traffic light in Portsmouth, United KingdomTraffic lights, traffic signals, or stoplights – also known as robots in South Africa, Zambia, and Namibia – are signalling devices positioned at road intersections, pedestrian crossings, and other locations to control the flow of traffic.Emergency vehicle lightingEmergency vehicle lightingVisual warning lights fitted to a vehicleRed and blue emergency lights on a fire engine in Canberra, AustraliaEmergency vehicle lighting, also known as simply emergency lighting or emergency lights, is a type of vehicle lighting used to visually announce a vehicle's presence to other road users. A sub-type of emergency vehicle equipment, emergency vehicle lighting is generally used by emergency vehicles and other authorized vehicles in a variety of colors.Pedestrian crossingPedestrian crossingPlace designated for pedestrians to cross a roadPedestrian crossings in (clockwise, from top left) Times Square, Manhattan; London; Seoul; and Brisbane, AustraliaA pedestrian crossing (or crosswalk in American and Canadian English) is a place designated for pedestrians to cross a road, street, or avenue. The term "pedestrian crossing" is also used in the Vienna and Geneva Conventions, both of which pertain to road signs and road traffic.Light railLight railForm of passenger urban rail transitGallery of light rail systems worldwide, from top left to bottom right: the Los Angeles Metro E Line, the Granada Metro, the Tunis Metro, the Rio de Janeiro Light Rail, the MTR Light Rail in Hong Kong, and Tvärbanan in StockholmLight rail (or light rail transit, abbreviated to LRT) is a form of passenger urban rail transit that uses rolling stock derived from tram technology, while having the capability to operate rolling stock on exclusive right of ways, on grade-separated section as well as in mixed traffic conditions.Emergency vehicleEmergency vehicleAn emergency vehicle is a vehicle used by emergency services. Emergency vehicles typically have specialized emergency lighting and vehicle equipment that allow emergency services to reach calls for service in a timely manner, transport equipment and resources, or perform their tasks efficiently. Emergency vehicles are usually operated by authorized government agencies, but some may also be operated by private entities where permitted by law.Level crossingLevel crossingIntersection where a road crosses a railway at the same levelMany level crossings, especially those with no barriers such as this one in Wales, are marked by crossed beams (US:crossbucks) to warn road usersA level crossing at Hoylake, Merseyside, England, with a train passingA level crossing is an intersection where a railway line crosses a road, path, or (in rare situations) airport runway, at the same level, as opposed to the crossing using an overpass or tunnel.DispatcherDispatcherA dispatcher is a communications worker who dispatches, i.e., receives and transmits information to coordinate operations of other personnel and vehicles carrying out a service.Fire stationFire stationA fire station (also called a fire house, fire hall, firemen's hall, or engine house) is a structure or other area for storing firefighting apparatuses such as fire engines and related vehicles, personal protective equipment, fire hoses and other specialized equipment. Fire stations frequently contain working and living space for the firefighters and support staff.Emergency serviceEmergency serviceEmergency services and rescue services are organizations that ensure public safety, security, and health by addressing and resolving different emergencies. Some of these agencies exist solely for addressing certain types of emergencies, while others deal with ad hoc emergencies as part of their normal responsibilities. Many of these agencies engage in community awareness and prevention programs to help the public avoid, detect, and report emergencies effectively.TramTramA tram, also known as a tramcar, streetcar or trolley is a form of urban rail transit in which vehicles, whether individual railcars or multiple-unit trains, run on tramway tracks laid on or parallel to public streets, or operate in segregated right-of-ways.Bus rapid transitBus rapid transitPublic transportation systemPublic transportPublic transportPublic transport (also known as public transportation, public transit, mass transit, or simply transit) refers to forms of transport made available for use by the general public. Public transport systems typically operate on fixed routes and schedules and charge a standardized fare intended to cover operating costs, often supplemented by public funding where required. There is no universally fixed definition of which modes are included.

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