Trials have begun for a speed limit project in Leeds which uses satellite-based telematics tracking devices to monitor drivers.

The "Intelligent Speed Adaptation" (ISA) system stops motorists from speeding by remotely applying brakes or cutting out the accelerator when modified cars drive illegally fast.

Oliver Heaney, UK Head of CELtrak, a provider of satellite-based telematics services, says: "For the past four years, a similar system has been operating in Ireland, through an insurance initiative. As a result, Irish roads have fewer accidents, as drivers have become more responsible and careful. This is not Big Brother, this is a big breakthrough for motoring in the UK."