Big Dig or Big New Viaduct — the folks working on Alaskan Way 2.0 continue to exclude all forms of The Third Option out of the dialogue — but whichever you favor, time’s running out to pipe up before the next stage of the game. And you’ve got a chance in just a few days: The roadshow’s coming back to our side of the bay next week — Tuesday night, 5-8 pm, at Madison Middle School.