Here in Chicago, when rush hour hits, cycling is a breeze =) You just pass cars right and left with the wind in your helmet. =) and drivers probably love us too, we are "one less car" =) (critical mass slogan).
The only thing you have to watch for is people trying to merge in and out of stopped traffic, other cyclists, and most importantly !doors! They are the leading cause of accidents, with getting hit from behind only making up 0.05 percent. I am a litte fuzzy on that number but, it is 0.0x where x is something very low. As for finding car free places, that is relatively easy, the Lakefront Bike path is car free when the police arn't patrolling it, which can be pretty scary. When your bowing your head at 1am hammering away almost out of your mind, and you look up to see a squat police cruiser rolling towards you quietly but, because of combined speeds very quickly. I have almost hit them twice =) I almost hit a cop on a segway a month ago, and I almost got manured by a horse cop a week before that. But, if you ride during the daytime, you get these dangerously ignorant pedestrians who walk all over the path and cross without looking and walk in the wrong lane around blind curves (perfect crit training curves) There are also ignorant cyclists, and ignorant roller bladers. The most common idiots are the ignorant cyclists and ignorant walkers. They tend to ride or walk in huge groups covering the entire path without watching for things going on around them. The streets are the safe haven =) the bike path is a dream at night, it is secluded and warm now, on windy nights the waves explode all the way over the path at intervals and you have to time your approach Indiana Jones style otherwise you will get blasted. If the wind is hitting you in the face though, it is hardest workout, snot, pain and growling hard for 13 mph on the worst nights. I met my first angry cyclist today, I blew by him on my winter beater MTB bike, and he just started shouting swear words at me, I am guessing that wasn't uncommon for him, he was a red faced drunk looking fool, and I smoked his silly ass. Anway, I am getting sidetracked, enjoy your Fourth of July everyone! it is officially Independance day.
Jacob