The gyratory appears to be open and, save for a few cosmetic bits, finished.
Upper Lewes Road allows travel in both ways but if you're joining the gyratory you head straight down and have to turn left, rather than the road bending around the way if did before.
That appears to be the most...
I'm dreading the congestion these works could cause. The roadworks up Hollingdean Road cause it to grind to a halt at peak times, never mind having the gyratory itself down a lane