That sign is ridiculous. There must still be enough old trucks that beep in operation to warrant  people working on a construction site to recognise the sound. If they get a delivery of cement or something do they refuse to accept it just because the truck beeps? Do they then keep ordering more cement until a non-beeping one arrives?<br><br>I've never had any problem recognising that beeping sound. I wonder is that white noise on trucks in Ireland? I'm fairly sure I've heard it but would have thought it was the sound of brakes. The beeping sound on the other hand definitely sounds like a warning to get out of the way.,(reply>), I don't think the reason for the sign is because the workers wouldn't recognize the beep.  The reason was because they don't want beeping trucks disturbing the residents in that area.