Below is an interesting article that is pretty self explanatory. It is just more evidence that tends to back the theories behind the use of separated bike facilities in high traffic, urban areas. They provide safety and comfort for riders, and in turn increase ridership dramatically.
Check out the linked article and video that has a pretty cool helmet cam video from a Montreal bike courier. I won't vouch for his safe riding techniques, but his heart is in the right place. Couriers tend to ride like taxi drivers drive, but my hat always goes off for both. They focus on speed and efficiency and not so much on personal safety and road etiquette.
CTV British Columbia - How many cyclists are really using bike lanes? - CTV News