The Government has introduced a new generation of average speed camera that can track motorists across entire networks of roads.
The first versions went live on a stretch of the A13 carriageway that heads from southeast Essex into East London on January 31.
Existing average speed cameras only monitor a car's speed between fixed points on the road, but the new models are capable of consistently tracking a vehicle.
The latest system has 84 cameras and 37 average speed monitoring points - it can even keep an eye on drivers entering and exiting a stretch of road.
RoadPilot, a firm that specialises in speed camera detection devices, has warned that this could be the start of an average speed monitoring system that spans the UK.
Chief Executive of RoadPilot, James Flynn OBE, said: "If this system proves successful, it could be extended or rolled out to other locations, all of which can be linked together.
"Taken to the extreme, the entire UK road network could, in theory, be linked up under one average speed monitoring system - meaning Big Brother could always be watching you!"
RoadPilot's speed camera database has already been updated with the new, advanced camera sites, so users of the company's products will be alerted to their presence