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…
The
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…
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…
Siren
A siren is a sound signal that priority vehicles use to warn other road users that they have to pass.
Seatbelt
Anyone who participates in a passenger car in traffic must always wear the seatbelt or be protected by an adapted and approved security system, …
