I ride Comm Ave every day, and I'll argue that it's safer than the bike path in question, particularly during rush hour. I know a lot of people feel safer on paths because there aren't any cars, but I think this is more emotional than rational, honestly. Comm Ave is a straight shot with wide lanes, excellent sight lines, and (finally!) brand new pavement. Sure it's busy, but name me a street in Boston that isn't -- it's just a fact of life when you cram that many people into that small a space. Far from being a "demolition derby", I'd go so far as to say that if you find Comm Ave a nightmare, there are very few streets in Boston where you'd feel comfortable.