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An early radar detector Car radar detector (Japanese) A radar detector is an electronic device used by motorists to detect if their speed is being monitored by police or law enforcement using a radar gun. Most radar detectors are used so the driver can reduce the car's speed before being ticketed for speeding.
The trip computer's display in a 2004 Acura TL, tracking the average mileage, average speed, and distance traveled for the stated time period. Trip computer display A trip computer is a computer fitted to some cars ; most modern trip computers record, calculate, and display the distance travelled, the average speed, the average fuel consumption ...
Most of the GPS data would procure speed information, but additional speed limit traffic signs can also be used to extract information and display it in the dashboard of the car to alert the driver about the road sign. This is an advanced driver-assistance feature available in most high-end cars, mainly in European vehicles.
Standard radar speed sign with block letters. Pictured with solar panel.. A radar speed sign or speed feedback sign is an interactive sign comprising a speed-measuring device (e.g. a loop detector or radar) and a message sign generally constructed of a series of LEDs, which displays vehicle speed of approaching motorists. [1]
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"Passive" devices store GPS location, speed, heading and sometimes a trigger event such as key on/off, door open/closed. Once the vehicle returns to a predetermined point, the device is removed and the data downloaded to a computer for evaluation. Passive systems include auto download type that transfer data via wireless download.
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When a driver exceeds the speed limit, any of the following can occur: a small ding will sound, the speed reading will turn red if the odometer is digital, an icon will light up and a ding will sound, or the vehicle will give a verbal response alerting the driver of their speed and to slow down. One speed monitoring technology which is ...