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VASCAR (Visual Average Speed Computer And Recorder) is a type of device for calculating the speed of a moving vehicle. The first VASCAR device was created in 1966 by Arthur Marshall. [ 1 ] It is used by police officers to enforce speed limits , and may be preferred where radar or lidar is illegal, such as some jurisdictions in Pennsylvania ...
At Conformity of Production Audits the upper limit on indicated speed is increased to 110 percent plus 6 km/h (3.7 mph) for cars, buses, trucks, and similar vehicles, and 110 percent plus 8 km/h (5.0 mph) for two- or three-wheeled vehicles that have a maximum speed above 50 km/h (31 mph) (or a cylinder capacity, if powered by a heat engine, of ...
The Auto-Meter used a magnet attached to a rotating shaft to induce a magnetic pull upon a thin metal disk. Measuring this pull provided accurate measurements of both distance and speed information to automobile drivers in a single instrument. The Warners sold their company in 1912 to the Stewart & Clark Company of Chicago.
In 1895, Curtis H. Veeder invented the Cyclometer. [1] [2] [3] The Cyclometer was a simple mechanical device that counted the number of rotations of a bicycle wheel.[4] [5] A cable transmitted the number of rotations of the wheel to an analog odometer visible to the rider, which converted the wheel rotations into the number of miles traveled according to a predetermined formula.
Tachymeter scale on a Citizen watch bezel. A tachymeter (pronounced / t æ ˈ k ɪ m ə t ər /) is a scale sometimes inscribed around the rim of an analog watch with a chronograph.It can be used to conveniently compute the frequency in inverse-hours of an event of a known second-defined period, such as speed (distance over hours) based on travel time (distance over speed), or measure distance ...
If the average speed exceeds the speed limit, then a penalty is automatically issued. [17] Police in some countries like France have been known to prosecute drivers for speeding, using an average speed calculated from timestamps on toll road tickets. [18] Speed enforcement using average speed measurement is expressly prohibited in California. [19]
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traveled Distance: miles miles kilometers economy higher rating is better for vehicle longevity; lower elapsed is better for vehicle resale Drag coefficient (ratio) (ratio) (ratio) economics, top speed, range lower is better for moving into/through a fluid(air/water), higher is better for stopping/redirecting with a fluid