They have been working on the gutters for some time, but I did not realise their real purpose. Then they appeared in the morning to do some more road works. Later, in the evening on my way home, the roundabout had appeared. This photo was taken the next morning.
I passed the roundabout this morning on the return leg of the DHBC slowies ride, they were finishing the concrete in the middle of it. A bus had a hard time getting around it and had to go the wrong way. Once the concrete has dried the buses will be able to go over the top of it.