I agree with the concerns about the M50 roundabout which I use regularly. There is considerable congestion on the ramp onto the Kildare road, no matter whether it is a Monday or Friday evening. I am not convinced by the argument of the Rail Procurement Agency that the timings and light sequences it has in place are enough. Only five cars can get onto the roundabout at any one time. Given the novelty factor of the Luas, drivers on the ramp will be looking at it only to discover that the lights have already gone green for three seconds, which will result in probably only two cars getting onto the roundabout. That will be a huge problem and needs to be resolved.