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Height limitAustralia

An introduction to the traffic rules and road signs of Australia. Learn about driving, road safety and much more in our illustrated book, with answers to frequently asked questions.

For informational purposes only. Always follow official regulations. Some content and images were created with AI assistance.

Traffic signs
Traffic rules
Australia

27. Height limit

A height limit prohibits vehicles whose total height exceeds the value shown from entering or passing a road section, bridge, tunnel, gateway or other structure. The vehicle’s height includes its load and any equipment attached above it.

Drivers of high vehicles must know their exact height, observe advance warnings and use an alternative route when necessary. They should never rely only on visual judgement or attempt to pass beneath a structure when safe clearance is uncertain.

Height limit
Height limit of 3.70 metres at a bridge. (Queensland, Australia)
Wikimedia.org • Kgbo • CC BY-SA
How should you read a low-bridge height restriction in Australia?

Look for the locally prescribed height restriction or clearance warning near urban underpasses, older bridges and remote roads. The displayed clearance is normally in metres. A warning may describe a hazard ahead; a prohibitory sign indicates a route you cannot enter if your vehicle exceeds the limit.

🔗 nsw.gov.au • Australia, NSW official road-user guidance — height-limit

Does a roof load count when checking vehicle height in Australia?

Yes for practical clearance: measure the vehicle at its highest point with its load and fitted accessories, such as a roof box, bicycle or roof rack. Check the local legal measurement rules as well; an empty vehicle’s registered height is not enough when equipment has been added.

🔗 nsw.gov.au • Australia, NSW official road-user guidance — height-limit

What should you do if your vehicle is too high for a bridge or tunnel in Australia?

Do not try to squeeze under the structure. Use the signed alternative route and, if you are already close to the obstruction, stop where safe and seek traffic-control assistance rather than reversing unpredictably into moving traffic.

🔗 nsw.gov.au • Australia, NSW official road-user guidance — height-limit

1 Australia 2 Motorway 3 Residential area 4 Speed limit 5 Advisory speed 6 Bike path 7 Pedestrian warning 8 Bridge 9 Speed bump 10 Toll road 11 One-way traffic 12 Slope 13 Bus stop 14 Stop sign 15 Give way 16 Roundabout 17 Pedestrian crossing 18 Railway crossing 19 Mandatory direction 20 Turn prohibition 21 School area 22 Crossing animals 23 Slippery road 24 Curve 25 Chevron 26 Wrong-way driving 27 Height limit 28 Radar speed sign 29 Selective barriers 30 Traffic lights 31 Traffic lights warning 32 Pedestrian lights 33 Road markings 34 Left-hand traffic 35 Driving licence 36 Location marker 37 Emergency telephone 38 No parking 39 No stopping 40 Disabled parking 41 Traffic management 42 Reversing 43 U-turn 44 Uncontrolled crossroad 45 Oversize load 46 Licence plate 47 Charging station 48 Local traffic 49 Moped 50 Truck 51 Bus 52 Police 53 Ambulance 54 Pothole 55 Path 56 Particulates 57 Air pollution 58 Rush hour 59 Road code 60 Two-way traffic 61 Street gutter 62 Cargo bike 63 Forestry vehicle 64 Construction vehicle 65 Semi-trailer truck 66 Trolleybus 67 Speed pedelec 68 Delivery vehicle 69 Idling 70 Tow truck 71 Four-wheel drive 72 Bicycle 73 Motorcycle equipment 74 Tram 75 Rail track 76 Caravan 77 Trailer 78 Tow hitch 79 Fire truck 80 Siren 81 Convoy 82 Emergency vehicle lighting 83 Agricultural machinery 84 Electric bicycle 85 Electric vehicle 86 Pedelec 87 Quadricycle 88 Microcar 89 All-terrain vehicle 90 Van 91 Recreational vehicle 92 Scooter 93 Trikke 94 Personal mobility device 95 Skateboard 96 Segway 97 Kick scooter 98 Roller skates 99 Mailman 100 Hitchhiker ...