Speed limitsWhat is the M25 speed limit? Variable limits, speed cameras and the Dartford CrossingMost of London's orbital motorway can change its limit within minutes, so here is what the gantries mean, section by section.

Speed limitsWhat is the M1 speed limit? Smart motorway sections, speed cameras and roadworksFrom the M25 to Yorkshire, long stretches of the M1 can change their limit, so here is what to expect, junction by junction.

Speed camerasWhere are the speed cameras in London? Average speed roads, the A406 and tunnel limitsLondon's cameras follow the places where people have been hurt, and its limits are falling road by road, so here is how to read the capital.

Speed limitsWhat is the A9 speed limit? Average speed cameras, HGV limits and dualling roadworksScotland's longest trunk road switches between single and dual carriageway, and your limit switches with it, so here is the whole picture from Dunblane to Thurso.

Speed limitsWhat is the M4 speed limit in Wales? 50 mph zones, the A55 and average speed camerasWales has its own rules on its busiest roads, from green cameras at Port Talbot to the Brynglas tunnels, so here is where the limits change.

Speed limitsWhat is the national speed limit in the UK? The sign, road types and vehicle limitsThe sign with no number on it means different things on different roads and in different vehicles, so here is the whole picture.

Speed camerasHow do average speed cameras work in the UK? SPECS, roadworks and permanent routesThey measure a whole stretch of road rather than a single point, so here is how the sums work and where you will meet them.

Speed limitsWhat do smart motorway signs mean? Variable speed limits, the red X and the hard shoulderRed circles, red crosses and blank signs each mean something specific, and knowing them makes busy motorways a lot calmer.

Speed limitsWhere do 20 mph limits apply in the UK? The Wales default, London roads and 20 mph zonesOnly Wales has a national 20 mph default, but 20 mph streets are spreading through London, Scotland and towns across the UK.

Safe drivingWhat are the stopping distances in the Highway Code? By speed, in the wet and on iceThe official chart in plain numbers, why the distances grow so quickly with speed, and how much room to leave when the road is wet.

Country guidesUnited Kingdom speed limits and cameras: 2026 driving guideLimits in mph, what the national speed limit sign really means, and why average-speed cameras line so many motorway roadworks.

Speed limits and speed cameras: United Kingdom