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Two-second rule

Two-second rule

The two-second rule is a rule of thumb by which a driver may maintain a safe trailing distance at any speed. The rule is that a driver should id…

Tire code

Tire code

Automobile tires are described by an alphanumeric tire code, which is generally molded into the sidewall of the tire. This code specifies the di…

Tachometer

Tachometer

A tachometer is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the r…

Speed bump

Speed bump

A speed bump is a traffic calming device that use vertical deflection to slow motor-vehicle traffic in order to improve safety conditions. Varia…

Snow chains

Snow chains

Snow chains are devices fitted to the tires of vehicles to provide maximum traction when driving through snow and ice. Snow chains attach to the…

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