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  2. Assured clear distance ahead - Wikipedia

    en.wikipedia.org/wiki/Assured_Clear_Distance_Ahead

    A vehicle accelerating from a stop travels this distance in time t i = √ 2d i ⁄ a i while through traffic travels a distance equal to their speed multiplied by that time. The time t pc , for the stopped motorist, is the sum of perception time and the time required to actuate an automatic transmission or shift to first gear which is usually ...

  3. Tax horsepower - Wikipedia

    en.wikipedia.org/wiki/Tax_horsepower

    It is an administrative unit originally calculated partly from the power of the engine and used to calculate the amount of tax that may be due at the time of registration. The Citroën 2CV (two tax horsepower) was the car that kept such a name for the longest time. Its use in France dates from 1 January 1913.

  4. Odometer - Wikipedia

    en.wikipedia.org/wiki/Odometer

    An electronic odometer (below the speedometer) with digital display showing 91,308 miles (146,946 km) An odometer or odograph is an instrument used for measuring the distance traveled by a vehicle, such as a bicycle or car.

  5. VASCAR - Wikipedia

    en.wikipedia.org/wiki/VASCAR

    A VASCAR unit uses a stopwatch and a simple computer. An operator records the moments that a vehicle passes two fixed objects (such as a white circle or square painted on the road) that are a known distance apart. The vehicle's average speed is then calculated by dividing the distance between the points by the time taken to travel between them.

  6. Braking distance - Wikipedia

    en.wikipedia.org/wiki/Braking_distance

    Braking distance refers to the distance a vehicle will travel from the point when its brakes are fully applied to when it comes to a complete stop. It is primarily affected by the original speed of the vehicle and the coefficient of friction between the tires and the road surface, [Note 1] and negligibly by the tires' rolling resistance and vehicle's air drag.

  7. Adaptive cruise control - Wikipedia

    en.wikipedia.org/wiki/Adaptive_cruise_control

    Adaptive cruise control does not provide full autonomy: the system only provides some help to the driver, but does not drive the car by itself. [3] For example, the driver is able to set the cruise control to 55mph, if the car while traveling that speed catches up to another vehicle going only 45mph, the ACC will cause the car to automatically brake and maintain a safe distance behind the ...

  8. Drag racing - Wikipedia

    en.wikipedia.org/wiki/Drag_racing

    Time from a car leaving the starting line to crossing the finish line. First or worst [ 46 ] – if both drivers commit a foul, the driver who commits the foul first loses, unless it is two separate fouls, where the loser is the driver who committed the worse foul (lane violation is worse than foul start, and failure to participate in a post ...

  9. Two-second rule - Wikipedia

    en.wikipedia.org/wiki/Two-second_rule

    The three second rule is a time for the defensive driver to judge the minimum safe trailing distance to help avoid collisions under ideal driving conditions. The red car's driver picks a tree to judge a two-second safety buffer. The two-second rule is a rule of thumb by which a driver may maintain a safe trailing distance at any speed.

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