Prohibitory traffic sign

Prohibitory traffic signs are used to prohibit certain types of manoeuvres or some types of traffic.

Modern prohibitory traffic signs

No entry

No admittance to unauthorised personnel, usually shown as a red circle with a white rectangle across its face. It is often used for one-way traffic.

Australia
Botswana, Lesotho, Namibia, South Africa, Swaziland, Tanzania
Canada

Canada
New Zealand
Norway
Philippines
Sweden
United States

Wrong way

These signs denote that the road is only for traffic coming in the opposite direction. Used at intersections to roads with one-way traffic or ramps.

Canada
Norway
United States

Road closed

No admittance for vehicles. It used on closed roads.

New Zealand

No straight ahead

Traffic is not permitted to continue straight, and must usually turn. These may occur at an intersection with incoming one-way traffic.

United States, Canada

No motor vehicles

Motor vehicles are not permitted in this region.

Norway
Sweden
United States

No motorcycles

Motorcycles are not permitted in this area.

Norway
Sweden

No heavy goods vehicles

Heavy goods vehicles are not allowed

Australia
Canada
Canada (Québec)
New Zealand
Norway
Philippines
Sweden
United States
United States: No commercial vehicles

No buses

Buses are not permitted.

Australia

No pedestrians

Pedestrians are not allowed on the road, but may use a footpath instead.

Australia
Norway
Philippines
Philippines (use overpass)
Philippines (use pedestrian crossing)
Sweden

No pedestrians or bicycles

Pedestrians and bicycles are not permitted, but may be allowed on a footpath.

Canada
Norway
United States
United States (also no motor-driven cycles are allowed^[1])

No right, left, or U-turn

Either for all vehicles or with some exceptions (emergency vehicles, buses). These are usually to speed up traffic through an intersection or due to street cars or other right of ways or if the intersecting road is one-way. Indicated near-universally by an arrow making the prohibited turn overlaid with a red circle with an angular line crossing it.

No right turn signs

Australia

Australia
Botswana, Lesotho, Namibia, South Africa, Swaziland, Tanzania
New Zealand
Norway
Philippines
Saudi Arabia
Sweden
Thailand, Cambodia
United States, Canada

No left turn signs

Australia

Australia
Botswana, Lesotho, Namibia, South Africa, Swaziland, Tanzania
New Zealand
Norway
Sweden
Philippines
United States, Canada

No turn signs

Canada
United States

No U-turn signs

Australia

Australia
Botswana, Lesotho, Namibia, South Africa, Swaziland, Tanzania
New Zealand
Norway
Philippines
Saudi Arabia
Sweden
United States, Canada
Caltrans (Left turn on green arrow)

No left or U-turn signs

United States

Other turn prohibition signs

Canada: No right turn and straight ahead
Canada: No left turn and straight ahead

No overtaking

Either overtaking is prohibited for all vehicles or certain kinds of vehicles only (e.g. lorries, motorcycles, etc...). In the USA, this is usually phrased as "no passing zone" and indicated by a rectangular, black-on-white sign on the right side of the road that says "DO NOT PASS" and/or by a solid yellow line painted on the roadway marking the left limit of traffic (centerline), and sometimes supplemented by a yellow (no passing zone) sign on the opposite side of the road (where it can be seen by a driver who is attempting to pass). Conversely, when the passing restriction is lifted, a rectangular, black-on-white sign that says "PASS WITH CARE" is placed on the right side of the road and/or the yellow centerline changes from solid to broken (indicating that passing is allowed in that direction).

No overtaking or passing signs

Canada

Canada
Norway
Philippines
Sweden
Sweden: heavy vehicles are prohibited to overtake other motor vehicles
Thailand
United States

End of overtaking signs

Norway
Sweden
Sweden

Limits

Speed limits

See: Speed limit Used to indicate a maximum speed limit. The indicated limit is in mph in the USA and the UK, and in km/h in all other countries.

Speed limit signs

Australia
Canada
Germany, typical for most parts of Europe
New Zealand
Philippines
Sweden
United States

End of speed limit signs

Germany, typical for most parts of Europe
Philippines
New Zealand^[2]

Weight limits

Used denote maximum weight for bridges.

Norway
Philippines
Saudi Arabia
Sweden

Width limits

Used to denote maximum width on narrow roadways.

Norway
Philippines
Saudi Arabia
Sweden

Height limits

Used to denote height limit on bridges and underpasses

Norway
Philippines
Saudi Arabia
Sweden

Length limits

Used to denote maximum length.

Norway
Philippines
Sweden

No horns

Sounding your horn is not allowed for vehicles in some areas, most commonly in school zones, villages, or near hospitals or churches.

Philippines

No parking

Amongst one of the most familiar signs, this sign is used where parking is prohibited. Usually shown as a red diagonal bar inside a blue circle with a red ring in Europe and parts of Asia, and a 'P' in a red circle with a cross through in North and South America, elsewhere in Asia, Australia, Africa and Ireland. The no parking sign is a part of controlled parking zone sign, which is obsolete in Belgrade from 1997.

Australia
Botswana, Lesotho, Namibia, South Africa, Swaziland, Tanzania
Canada

Canada
France
Indonesia
Malaysia
New Zealand
Norway
Philippines
United States
Caltrans: No parking at Any Time (R28)

No stopping

This sign is used where parking and stopping is prohibited. Usually shown as a red cross inside a blue circle with a red ring in Europe and parts of Asia, and a 'E' in a red circle with a X through in South America.