Height limitIreland

An introduction to the traffic rules and road signs of Ireland. 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.


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.

Warning for electricity cables, safe height of 4.50 metres or 14 feet 7 inches. Warning for a traffic bump. (Kildare, Ireland)
Wikimedia.org • Leimanbhradain • CC BY-SA
How should you read a low-bridge height restriction in Ireland?

Irish low-bridge warnings can show metric and imperial measurements. Know the full vehicle height before the journey, including the load, and follow an indicated diversion if there is insufficient headroom.

🔗 revisedacts.lawreform.ie • Ireland, Traffic and Parking Regulations — articles 17, 34, 36; Signs Regulations 2025 dimensional and mass restrictions

🔗 rsa.ie • RSA Rules of the Road — guidance, law date 1 March 2025; read with later amendments

🔗 irishstatutebook.ie • S.I.433/2025 — current Irish traffic-sign and road-marking descriptions

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

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.

🔗 revisedacts.lawreform.ie • Ireland, Traffic and Parking Regulations — articles 17, 34, 36; Signs Regulations 2025 dimensional and mass restrictions

🔗 rsa.ie • RSA Rules of the Road — guidance, law date 1 March 2025; read with later amendments

🔗 irishstatutebook.ie • S.I.433/2025 — current Irish traffic-sign and road-marking descriptions

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

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.

🔗 revisedacts.lawreform.ie • Ireland, Traffic and Parking Regulations — articles 17, 34, 36; Signs Regulations 2025 dimensional and mass restrictions

🔗 rsa.ie • RSA Rules of the Road — guidance, law date 1 March 2025; read with later amendments

🔗 irishstatutebook.ie • S.I.433/2025 — current Irish traffic-sign and road-marking descriptions

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