I use the bike considerably more often than the car for many reasons. For starters, it's actually the most efficient form of transportation for short-distance runs where I live: just off the downtown core, in a nexus minutes from the financial, boutique shopping, club, Chinatown, creative/arts and student districts. During rush hour traffic, biking can get me to most of my regular destinations faster than my car, walking or public transport, and at no cost, save the occasional battery purchase for my bike's lights.
At the same time, I understand that cars have their uses too. The rest of my family live far off enough the subway lines that Sunday dinner is better reached by car. Trips to the grocery for a household of three salaried professionals are better done with a car. Anyone who's had to haul toddlers around knows how much support equipment they need, and how they're best carried by a minivan.
It is my belief that bikes and cars can co-exist in an urban situation. I think that it's impractical to have a car-free city, given the city's sprawl and the resulting social factors; I think it's the fantasy of overly strident Critical Massers and people who major in "work-deferral studies". At the same time, we must have bikes on the streets, and the belief otherwise is the product of a mind that believes that the storage of cars is the first priority of architecture and the sort of person who gets into the car to go to the corner store three blocks away. The city needs both cars and bikes.
Accordion City does have what's called a bike plan, and according to eye magazine, a local free weekly, it looks like this:
If you're a cyclist, car driver or both, feel free to leave a comment.

-Eldon
http://www.city.toronto.on.ca/cycling/bikeplan/index.htm
The jist of it was that here in Chicago, we also have a cyclist sympathizer for a mayor, who has laid out numerous bike lanes, made plans for more, and installed an absurd number of bike racks all over the city. The problem all these plans face is motorists. I hate to generalize, but most motorists(and pedestrians for that matter) think the bike lane is a joke. I've been cut off more times than I can count, been hit by people exiting vehicles, seen other cyclists hit, and once saw a valet company's sandwich board blocking a bike lane. All the planning in the world doesn't help, unless it is accompanied with proper law enforcement, which I have yet to see.
I hope this plan works, as both a cyclist and a motorist.
I really wish I lived in a bike-friendly city. It would make riding so much easier. And I really need the exercise.
Apparently, Pittsburgh does have a bicycling plan, but it seems to be geared (ha ha) more towards the recreational cyclist than a commuter. Thankfully, I'm moving in a month to a town about 10 miles outside of Boulder, CO. That whole area (while being all hippie-crunchy) seems to be one of the most biking-friendly I've ever seen. You can ride on the frickin' interstate! And forget just the painted bike lane that Philly has; downtown Boulder has a lane that's actually curbed off from the car lane! And still I saw people riding on the sidewalk! Get out there and ride in traffic, you big sissy!
Biking in Toronto:
-Certain death!!!!
Biking in Amsterdam:
-two way access to one way streets (hey...)
-bike PATHS (separated from both sidewalk and road)
-bike lanes where there are no bike paths
-cars that are used to cyclists and don't look right through them
-pedestrians that are used to cyclists and don't look right through them (How I HATE people who look before they cross the street, cross when they don't see a car and then almost get killed by my bike. Hello? I'm going 20 km/hr and I shouldn't have to brake for people JAYWALKING!)
-Opportunity to take bike in subway, if you need to.
-Buttons to activate traffic light, just like for pedestrians, but at a spot where you can reach it from your bike, without having to manouver (sp?) to the sensors in the middle of the road.
BIking anywhere else in Holland:
-Endless unobstructed bicycle paths... My entire 20 minute (by bike) route from my parents house to my high school was JUST bike path. No cars, no pedestrians, just bikes, all the way across town, and it went even further.
I do have a bike here though, and once it stops SNOWING I'm going to be using it daily again. (I don't mind the snow and rain myself, but the other traffic is too scary when the weather isn't optimal)
But at the places where the cycle-ways cross the roads, I have had cars IGNORE red lights (there so that cyclists can cross) and almost run me over, so I don't use them any more!
My favourite part of my 1/2 hour journey to my part-time job in town is along the path shared by pedestrians and cyclists thgough Hagley Park (a 500 acre park in the centre of town)- the only place where I can zoom around without having to worry about cars pulling out in front of me (they are pretty good about not opening doors into bikes now, as there was a campaign about it recently)
And I do occaisionally ride on the footpath, but mainly when I'm turning left and don't want to have to wait for traffic lights to go green (we drive and bike on the left here)
Cars are also essential for transporting things such as computers and bassoons. It's not a safe feeling; trying to cycle with a $10 000 musical instrument hanging out on either side of you!
Liz