Warning signs

Low clearance ahead

A bridge, tunnel or other structure ahead has limited overhead clearance.

Check the clearance against your vehicle's total height, including its load. Choose another route if your vehicle cannot pass safely.

The United States W12-2 displays the clearance between vertical arrows on a yellow diamond. Australia's W4-8 is a yellow diamond carrying LOW CLEARANCE wording and a height in metres.

How it looks in each country

Official sign in each country; the code is its number in the national rules. Signs that come in two directions show the left and the right version.

ArgentinaCode P-18
AustraliaCode W4-8
BangladeshCode B20
BrazilCode A-37
CanadaCode TC-052
ColombiaCode SP-50
IndonesiaCode 8c
IrelandCode W-110
MexicoCode SP-25
New ZealandCode PW-45
PhilippinesCode S2-4
Saudi Arabia
South AfricaCode W320
ThailandCode ต-32
United Arab EmiratesCode 425.1
United KingdomCode 530
United StatesCode W12-2
VietnamCode W.239b

Image credits

Sign images from Wikimedia Commons, used under their licences.

Argentina P-18: มองโกเลีย๔๔, CC BY-SA 4.0
Australia W4-8: Standards Australia, Public domain
Bangladesh B20: Bangladesh Road Transport Authority SVG work: Fry1989 eh?, Public domain
Brazil A-37: Departamento Nacional de Infraestrutura de Transportes, Public domain
Canada TC-052: British Columbia Ministry of Transportation and Infrastructure, Public domain
Colombia SP-50: Gobierno de Colombia, Public domain
Indonesia 8c: Menteri Perhubungan (Minister of Transportation of Indonesia), Public domain
Ireland W-110: Government of Ireland – Department of Transport, Public domain
Mexico SP-25: Original: Secretaría de Infraestructura, Comunicaciones y Transportes / Secretaría de Desarrollo Agrario, Territorial y Urbano Vector: Too Classy for This World, Public domain
New Zealand PW-45: New Zealand Transport Agency, Public domain
Philippines S2-4: Department of Public Works and Highways (Philippines) Sign redrawn by TagaSanPedroAko., Public domain
Saudi Arabia: มองโกเลีย๔๔, CC BY-SA 4.0
South Africa W320: Southern African Development Community, Public domain
Thailand ต-32: Government of Thailand, Public domain
United Arab Emirates 425.1: มองโกเลีย๔๔, Public domain
United Kingdom 530: UK Government, Public domain
United States W12-2: Unknown author, Public domain
Vietnam W.239b: Government of Vietnam, Public domain