BikesAlive - Occupy Kings Cross - 23 January

there were trial for that actually a while ago, but with speed cameras clocking each cars they capture, and working out how quickly they managed to get from A to B, that's on road like motorway thought rather than cities where such system would be diffcuilt.

I remember reading that 5 or so years ago, and hasn't a clue on how to begun searching for it.

They're in use in a lot of places now. But not urban areas. They tend to be used on main roads and motorways, where it's easy to operate - a point A and a point B. I'd rather it was distributed and thousands of cameras were placed all over London.