> I'm sympathetic to taxi/uber Not me. In SF at least they tend to block the bike lane and force bikes into vehicle traffic. For confident cyclists this is ok,

> I'm sympathetic to taxi/uber Not me. In SF at least they tend to block the bike lane and force bikes into vehicle traffic. For confident cyclists this is ok, but for many I can see that they do dumb things like try to pass on the right or not signal their intention to enter traffic. This is why I suggest that the best thing would be to fully dedicate the entire road. As to fully protected lanes, this is good, but like you said, still leaves issues like left turns.