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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] The purpose of radar speed signs is to slow cars down by making drivers aware when they are ...
An animation of an electronic Aston Martin speedometer's self-test routine, showing how an analogue speedometer hand may indicate the vehicle's speed A Ford speedometer, showing both mph (outer) and km/h (inner), as well as an odometer in miles A modern speedometer in a Toyota Corolla A digital, LCD speedometer in a Honda Insight
Model of Spirit of Australia, which holds the water speed record. Vestas Sailrocket, the fastest wind-powered watercraft. Decavitator, the fastest human-powered watercraft. Omer 5, the fastest human-powered submarine. The " Caspian Sea Monster ", the fastest ground-effect vehicle [a] Water speed records. Category.
The two-second rule is a rule of thumb by which a driver may maintain a safe trailing distance at any speed. [1] [2] The rule is that a driver should ideally stay at least two seconds behind any vehicle that is directly in front of his or her vehicle. It is intended for automobiles, although its general principle applies to other types of vehicles.
In the United States, speed limits are set by each state or territory. States have also allowed counties and municipalities to enact typically lower limits. Highway speed limits can range from an urban low of 25 mph (40 km/h) to a rural high of 85 mph (137 km/h). Speed limits are typically posted in increments of five miles per hour (8 km/h).
Canada. Under Motor Vehicle Safety Regulations, a low-speed vehicle is defined as a vehicle, other than an all-terrain vehicle, a truck or a vehicle imported temporarily for special purposes, that is powered by an electric motor, produces no emissions, is designed to travel on 4 wheels and has an attainable speed in 1.6 km of more than 32 km/h (20 mph) but not more than 40 km/h (25 mph) on a ...
Purpose. The wheel speed sensor was initially used to replace the mechanical linkage from the wheels to the speedometer, eliminating cable breakage and simplifying the gauge construction by eliminating moving parts. These sensors also produce data that allows automated driving aids like ABS to function.
Traffic enforcement camera. A Gatso speed camera. The camera's lens is visible at top left, while the large flash, used for illuminating number plates and calibration lines on the road when taking photographs, is visible on the bottom right. A speed camera in Mong Kok, Hong Kong. A speed camera on the Highway 5 in Joroinen, South Savonia, Finland.
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