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  2. Wheel speed sensor - Wikipedia

    en.wikipedia.org/wiki/Wheel_speed_sensor

    The most common wheel speed sensor system consists of a ferromagnetic toothed reluctor ring (tone wheel) and a sensor (which can be passive or active). The tone wheel is typically made of steel and may be an open-air design, or sealed (as in the case of unitized bearing assemblies). The number of teeth is chosen as a trade-off between low-speed ...

  3. Accident data recorder - Wikipedia

    en.wikipedia.org/wiki/Accident_data_recorder

    The latter can e.g. be calculated from the signal of the vehicle's wheel speed sensor. The recording of any signals that are available on the vehicle's own CAN bus, is possible with higher-class devices as well as the detection of a GPS signal for position and speed determination. Depending on the manufacturer, about 20 to 30 s are recorded ...

  4. OBD-II PIDs - Wikipedia

    en.wikipedia.org/wiki/OBD-II_PIDs

    OBD-II PIDs. OBD-II PIDs (On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool. SAE standard J1979 defines many OBD-II PIDs. All on-road vehicles and trucks sold in North America are required to support a subset of these codes, primarily for state mandated emissions inspections.

  5. Impact attenuator - Wikipedia

    en.wikipedia.org/wiki/Impact_attenuator

    Impact attenuator. A crash cushion installed on a motorway exit in Italy. An impact attenuator, also known as a crash cushion, crash attenuator, or cowboy cushion, is a device intended to reduce the damage to structures, vehicles, and motorists resulting from a motor vehicle collision. Impact attenuators are designed to absorb the colliding ...

  6. List of sensors - Wikipedia

    en.wikipedia.org/wiki/List_of_sensors

    Throttle position sensor. Tire pressure sensor. Torque sensor. Transmission fluid temperature sensor. Turbine speed sensor. Variable reluctance sensor. Vehicle speed sensor. Water-in-fuel sensor. Wheel speed sensor.

  7. Lidar traffic enforcement - Wikipedia

    en.wikipedia.org/wiki/LIDAR_traffic_enforcement

    Lidar traffic enforcement. Lidar has a wide range of applications; one use is in traffic enforcement and in particular speed limit enforcement, has been gradually replacing radar since 2000. [1] Current devices are designed to automate the entire process of speed detection, vehicle identification, driver identification and evidentiary ...

  8. Vehicle speed sensor - Wikipedia

    en.wikipedia.org/?title=Vehicle_speed_sensor&...

    Language links are at the top of the page across from the title.

  9. Collision avoidance system - Wikipedia

    en.wikipedia.org/wiki/Collision_avoidance_system

    A collision avoidance system (CAS), also known as a pre-crash system, forward collision warning system (FCW), or collision mitigation system, is an advanced driver-assistance system designed to prevent or reduce the severity of a collision. [2] In its basic form, a forward collision warning system monitors a vehicle's speed, the speed of the ...