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Spare tire

Spare tire

A spare tire (also called spare wheel) is an additional wheel with a tire for a motor vehicle. It is intended as a replacement for a car tire wh…

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…

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…

Runaway truck ramp

Runaway truck ramp

A runaway truck ramp is a traffic device that enables vehicles which are having braking problems to safely stop. It is typically a long, sand- o…

Roof rack

Roof rack

A roof rack is a set of bars secured to the roof of a car. It is used to carry bulky items such as luggage, bicycles, canoes, kayaks, skis, or v…

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