it is not fantastic!
I'm not great at the old sleep, so getting even less right now. There is little traffic between about 1AM and 5AM at least (and my weekday alarm is 5AM anyway so maybe it won't be so bad, but there may be more earlier traffic on weekdays I guess.)
It'll still be louder for a while after they sweep it, but I am hoping not so loud ... or might have to start closing the window (there is also a window on the other side, but we tend not to open that one as the AirBnB out that side often has smokers in it.)