Well, for what it's worth, I'm actually Australian, and our cities are very similar to those in the US. What I said holds as much for Perth or Sydney as it does

Well, for what it's worth, I'm actually Australian, and our cities are very similar to those in the US. What I said holds as much for Perth or Sydney as it does for Paris and London. The key is that traffic congestion reduces average car speed to something roughly equivalent to what you do on a bike, ie 15-20km/hr...