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  2. Traffic collision avoidance system - Wikipedia

    en.wikipedia.org/wiki/Traffic_collision...

    A traffic alert and collision avoidance system ( TCAS, pronounced / tiːkæs /; TEE-kas) is an aircraft collision avoidance system designed to reduce the incidence of mid-air collision (MAC) between aircraft. It monitors the airspace around an aircraft for other aircraft equipped with a corresponding active transponder, independent of air ...

  3. List of transponder codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Transponder_Codes

    0041–0057. Belgium. Assigned for VFR traffic under Flight Information Services (BXL FIC). [citation needed] 0100. Australia. Flights operating at aerodromes (in lieu of codes 1200, 2000 or 3000 when assigned by ATC or noted in the Enroute Supplement). [6] 0100–0400.

  4. Traffic information service – broadcast - Wikipedia

    en.wikipedia.org/wiki/Traffic_information_service...

    Traffic information service – broadcast. Traffic information service – broadcast ( TIS–B) is an aviation information service that allows pilots to see aircraft that are not emitting ADS-B data but have a basic transponder . As aircraft are discovered by primary radar and respond with encoded altitude information, this information is ...

  5. Identification friend or foe - Wikipedia

    en.wikipedia.org/wiki/Identification_friend_or_foe

    Identification friend or foe. Identification, friend or foe ( IFF) is a combat identification system designed for command and control. It uses a transponder that listens for an interrogation signal and then sends a response that identifies the broadcaster. IFF systems usually use radar frequencies, but other electromagnetic frequencies, radio ...

  6. Air traffic control radar beacon system - Wikipedia

    en.wikipedia.org/wiki/Air_traffic_control_radar...

    The transponder has a small required set of controls and is simple to operate. It has a method to enter the four-digit transponder code, also known as a beacon code or squawk code, and a control to transmit an ident, which is done at the controller's request (see SPI pulse below). Transponders typically have 4 operating modes: Off, Standby, On ...

  7. List of toll roads in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_toll_roads_in_the...

    16.1. Brighton Boulevard in Denver. Chambers Road in Aurora. $1.50~$4.50 [32] All-electronic toll; allows ExpressToll and license plate toll; HOV-3+ must have an ExpressToll transponder which they can slide to the HOV indicator to ride free; motorcycles and RTD buses are toll-free [33] US 36 (Express Lanes) 16.0.

  8. Automatic vehicle location - Wikipedia

    en.wikipedia.org/wiki/Automatic_vehicle_location

    Automatic vehicle location ( AVL or ~ locating; telelocating in EU) is a means for automatically determining and transmitting the geographic location of a vehicle. This vehicle location data, from one or more vehicles, may then be collected by a vehicle tracking system to manage an overview of vehicle travel.

  9. Texas state representative wants transponders in all cars

    www.engadget.com/2005-04-07-texas-state...

    This just goes to prove that one bit of sanity cannot go unanswered. Representative Larry Phillips has introduced a bill in the Texas House of Representatives which would require that all state ...