Prohibitory traffic sign

No admittance to unauthorised personnel, usually shown as a red circle with a white rectangle across its face.

These signs denote that the road is only for traffic coming in the opposite direction.

These may occur at an intersection with incoming one-way traffic.Motor vehicles are not permitted in this region.

Indicated near-universally by an arrow making the prohibited turn overlaid with a red circle with an angular line crossing it.

Motorists are expected to be aware of this, as the majority of speed limit signs display only a number and no specific units, although some countries' signs do display the unit as well.

Used to denote that a previously posted speed limit is no longer in effect.

Stop at customs that are used at border crossings, toll roads or police.