There's a company that provides skips, cement mixers and large tipper lorries near where I live. Some of their vehicles make the white noise sound along with a "Caution, vehicle turning right" announcement when they turn into the road towards their facility.<br><br>Personally, I think they're crap. If you have to have an announcement (like "vehicle reversing") to make it clear what's going on, then the noise has failed to help. I think a better idea would be having a "BEEP CHHHH BEEP CHHHH" combination of the two alert systems.