A few things that irked me *spoilers*

Now, according to the director, Alberta is in fact, the province, Alberta, and she's coming from Alberta, to Vancouver.

She travels over the lions gate towards downtown, which is not the route that any bus coming from Alberta would take. Then, to make matters worse, they travel over the grandville street bridge, again towards downtown Vancouver.

--- > downtown < ----

Now, I hate to be a stickler, but when the movie actually labels the city that it was shot in, which doesn't happen too often with Vancouver, these kind of oversights are a little obnoxious, especially at the opening of the movie. It didn't lend the movie a lot of credibility moving forward.