I have no reason to believe the following is false, but here goes. ALL DRIVERS PLEASE TAKE NOTE Subject: Speed cameras - new tactics Those new electronic signs on the M4 were switched on this 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 know you've been caught as the cameras don't flash. They work 24/7, 365 days a year, and theoretically, there's 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 (between 14 and 15) 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 These new signs are the big overhanging ones on hugh concrete pillars. You would have seen the purple piping for these being installed on the M1. A1. A1M. M6, and several other motorways. In effect the days of the speeding driver is over for good. Be warned and spread the news.