UK speed cameras explained: types, zones and the law

Cameras are a fact of British roads. Knowing how each type works makes you a smoother, safer driver, not a faster one.

The main types

• Fixed spot cameras (Gatso, Truvelo): measure speed at a point. Yellow housings are mandatory; the flash may be rear or front facing.
• Average-speed zones (SPECS, VECTOR): cameras read plates at multiple points and compute your average between them. Braking at each camera achieves nothing; the zone measures the whole stretch.
• Smart motorway cameras (HADECS): mounted on gantries, enforce variable limits, active even when the limit sign is off.
• Mobile vans: anywhere with a safe stopping spot, commonly bridges and lay-bys on A-roads.
• Red-light cameras: junction enforcement; many also measure speed.

Myths worth retiring

• "10 percent plus 2 is allowed." That is prosecution guidance, not a right. The limit is the limit.
• "Average cameras cannot track lane changes." They can and do.
• "Cameras must catch you twice." One good reading is enough.

Are camera alerts legal?

In the UK, yes: apps and devices that warn of camera locations are legal. France, Germany and Switzerland prohibit or restrict them, which is why responsible apps disable alerts by geography. Scenic Way follows those rules automatically.

The point of knowing

Alerts are not about dodging tickets; they are a nudge to check your speed where enforcement says crashes happen. Smooth beats fast on every road worth driving.