UK Motorway Speed: 70 mph (Not km/h) — Smart-Motorway Cameras

The motorway speed limit in United Kingdom is 112 km/h. Note: Speed limits in mph: 30 mph urban, 60 mph rural, 70 mph motorway

Miles, not kilometres — and the gantry overrides the sign

The UK works in miles per hour, not km/h: the motorway limit is 70 mph (about 112 km/h), rural roads 60 and towns 30. The modern twist is smart motorways, where variable limits appear on overhead gantries — 60, 50, even 40 mph — and those gantry numbers are legally enforced and camera-checked, overriding the standard 70. SPECS average-speed cameras are widespread, clocking you over a stretch rather than at a point. The country drives on the left. The alcohol limit is 0.08 in England and Wales but a lower 0.05 in Scotland. Serious speeding runs £150–2,500 and six points or disqualification — so watch the gantries, they change fast.

United Kingdom Speed Limits Explained

United Kingdom enforces different speed limits depending on the type of road and vehicle.

| Road Type | Cars | Trucks |

|———–|——|——–|

| Urban | 48 km/h | 48 km/h |

| Rural | 96 km/h | 80 km/h |

| Motorway | 112 km/h | 96 km/h |

Motorway note: Speed limits in mph: 30 mph urban, 60 mph rural, 70 mph motorway

Urban Speed Limits

In built-up areas of United Kingdom, the default speed limit for cars is 48 km/h. School zones and residential areas may have lower limits of 20-30 km/h.

Motorway Speed Limits

On motorways (highways/expressways), cars can travel at up to 112 km/h in United Kingdom.

Trucks and heavy vehicles are limited to 96 km/h on the same roads.

Speeding Penalties

Get caught speeding in United Kingdom? Here is what it costs:

• 1-9 mph over: £100 + 3 points GBP

• 10-20 mph over: £Band A: 25-75% weekly income GBP

• 21-30 mph over: £Band B: 75-125% weekly income GBP

• Over 30 mph: £Band C: 125-175% weekly income GBP

What Most Guides Don’t Tell You

Enforcement Reality

Speed enforcement in United Kingdom is aggressive. Camera networks cover motorways, urban arteries and rural trunk roads.

The typical enforcement tolerance is around 3 km/h above the posted limit. Anything beyond that triggers an automatic fine.

Truck Speed Limits

Heavy vehicles on United Kingdom motorways are capped at 96 km/h, creating a speed differential of 16 km/h with passenger cars. Be alert when overtaking or merging.

Special Motorway Rules

Speed limits in mph: 30 mph urban, 60 mph rural, 70 mph motorway

Alcohol and Speed

The BAC limit in United Kingdom is 0.08. Combining alcohol with a speed offence significantly increases the penalty, including possible licence suspension.

Left-Hand Traffic

United Kingdom drives on the left. If you normally drive on the right, the unfamiliar road layout can slow your reaction time. Stay well within the speed limit until you are comfortable with the mirror-image road design.

How United Kingdom Compares

Key Facts at a Glance

More Resources

• Full Driving Rules for United Kingdom

• World Speed Limit Map

• Speed Unit Converter

• Speeding Fine Calculator