I'm also in the Boston area (Somerville) and have been wondering about the proper way to respond to right turns with a cyclist in the bike lane behind me.
When I have right-of-way and use my turn signal ahead of time, shouldn't I have the ability to turn right without waiting for the bike to pass (similar to how the cars behind me must wait for me to make my turn before continuing?)
I believe (so don't take it as fact), if your turn signal is on and they're behind you, you have the right of way. IF they edge forward to the line (as many do, which I think is legal?) and are to your front-right you should wait.
Again, driving and biking laws get muddled so it's hard to tell.
When I have right-of-way and use my turn signal ahead of time, shouldn't I have the ability to turn right without waiting for the bike to pass (similar to how the cars behind me must wait for me to make my turn before continuing?)