I got this in an email, can anyone confirm it as valid? The new electronic signs on the M4 were switched on last Tuesday. The bad news is that they are rigged with the SPECS speed cameras. SPECS is a computer-camera based system. As you go past the sign a digital camera reads your number plate. When you go past the next sign your number plate is read again. The computer knows how far apart the signs are so it can work out your average speed between the two, or three or four. The system is fully automatic and will issue a ticket without any form of human intervention. It does this for every single vehicle that passes. You will not now you've been caught, as the cameras do not flash. They work 24/7, 365 days a year, and theoretically, there is absolutely no limit on the number of tickets that the system can issue. The whole section of the M4 between Theale (J12) and Membury Services (J14 - J15) is wired, both ways. The system is set to trigger a ticket at 78 mph. Radar detectors will be of no use as SPECS is entirely passive. There is no radar or laser beam to detect.