I am skeptical of the "smooth flow" prospects, esp during BIW traffic and summer Route 1 tourists. We'll see.
As for the traffic light at Woolwich town office, that is mostly for all of us living on both sides of the Nequassit road crossroad needing to get out and into Bath. We are not optimistic (per a recent Woolwich town meeting on the issue). It will clog southbound traffic before entering the bridge construction area.
We'll be watching closely, but personally I'm expecting major delays...I hope I'm wrong.
Bob