Not seen any other topics on this, but could be old news
A few days ago i saw council rubbish truck/lorry stopped at the lights indicating to turn down into murieston gardens. as well as the indicators there was a speaker broadcasting "vehicle turning left".
seems a good idea (won't help folk who listen to music with headphones when cycling though!). fair play to the council for trying out new things and if it prevents some left hooks it can only be a good thing. only seen the truck just once but it didn't seem brand new so it might be out and about for a couple of months already