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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…

Train

Train

A train is a form of rail transport consisting of a series of connected vehicles that generally run along a railroad (or railway) track to trans…

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…

Sunglasses

Sunglasses

Sunglasses are a form of protective eyewear designed primarily to prevent bright sunlight. When driving a vehicle, particularly at high speed, d…

Slope

Slope

A slope or grade of a road refers to the tangent of the angle of the road to the horizontal. It is a special case of the slope, where zero indic…

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