Space isn't the problem; TfL came up with a fully segregated option that was tested at the transport research lab, but I think it's Westminster Council that's the sticking point.
They put that roundabout at Battersea. Many cyclists prefer to stay on the road as it's so much quicker there.
They put that roundabout at Battersea. Many cyclists prefer to stay on the road as it's so much quicker there.