Not much love for biking here; You'd almost think that most of the people on Hacker News are from Californian suburbs... Seriously though, biking in cities is great. It's one of those critical mass problems where the more people that do it the better the infrastructure gets, the more aware drivers become and there is a herd mentality where bikers tend to flow together making them more predictable and therefore safer…
I've done a little walking in Toronto, never biked. The streetcars' recessed tracks in the road look like a nightmare. I'm sure they're easy to cross perpendicularly, but riding longitudinally with them and getting your tire into a crack could end very badly. If you have to go through an intersection where streetcars turn and the tracks snake all over, it would be hard to ensure you're always crossing them perpendicu…
They're not only dangerous because of the cracks, but they're also extremely slippery when it rains.