First, it is prohibited for me, a biker, to ride on the sidewalk. Since it is physically impossible under the best conditions for me to pedal 45 mph, I am afraid that I will be in the road even though I can't go the speed limit. It's a LIMIT, cars, not a minimum. Next, I don't like the comments about how bike lanes solve everything. They are not wide enough for bikes to pass each other, and they are close enough to the curb that we run the risk of being doored. Worst part is, though, that during high-traffic times, left turns from the bike lane (or getting into the left lane) impossible. Especially since, given the lane, drivers expect you to never stray from it!