First off I realize I'm resurrecting an older thread, been away for a while.
I cycle through that exact intersection at good 2-3 times a week. One of the routes I can take to work. Now I've never gone through there during rush hour recently. Usually it is around 2:30pm. So it is before the school kids get out.
I can't say if the traffic along Elliot/Claredon is quieter now than before at 2:30pm. As I didn't cycle before that thing was put up. Yet there hardly seems to be any traffic coming through there now. 90% of the time I don't even have to stop at the stop sign. In fact I had someone stop for me and I just waved through as I don't think they do have to stop for me.
I can say there is definitely far less traffic on 45th. But it almost seems to me that because people can't get onto 45th, they just have decided to avoid Elliot/Claredon and stick with 41st and 49th.
I know there are counters on 45th on either side of the blockade. I'm also wondering if there are counters on Elliot/Claredon. If so it would be interesting to know if traffic volume is lower. Of course right now is a bad time as it is summer and we would have to wait until people get back from their holidays.