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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…

Slippery road

Slippery road

Road slipperiness is a condition of low skid resistance due to insufficient road friction. It is a result of snow, ice, water, loose material an…

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…

Roundabout

Roundabout

A roundabout is a kind of circular intersection in which the traffic continuously drives in one direction around a central island. The drivers a…

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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