Not sure where to put this but here goes. I have noticed lately that on some slip roads leading ONTO the M1 there have been traffic lights installed ( not in use yet ) at the bottom of the slip road as you join the motorway. Can anyone enlighten me as to what thats all about? Surely it's dangerous to have traffic moving from a stationary position when the lights go to green onto a motorway of fast flowing traffic? And surely the traffic that has to stop for the lights will back up and cause more congestion on the roundabout at the top of the slip road? Does anyone know what its all about and how its expected to work?