Two summers ago, leaving Banff, I was stuck in a traffic line up for 45 minutes. There were construction signs advising drivers that the right lane was closed ahead. As typical, drivers merged into the left hand lane asap. I got a bit impatient and moved over to the right hand lane after 45 minutes. Trying to be only a 1/2 jerk, I was only doing 50 km/h while passing multitudes of cars. A km later, we got to the "construction", there was nothing there.
Evidently, they didn't bother to cover up the warning signs when they were finished for the day. If people used the "zipper" philosophy (me included earlier), the traffic would have been fine.
I tend to zipper southbound Deerfoot on the merge from Deerfoot Meadows. I'm in that area 2-3 times a week. I don't speed down the right lane at 100 km/h -- like above, I'm moving at 50 ish km/h. Primarily for safety as, far too often, I see people pull into the right lane from almost a standstill. I'm "allowed" to merge almost immediately almost all the time. The key is not being the jerk in a BMW racing down at 120 km/h. Also, a BIG friendly wave to the individual who let me in.
Before anyone comments about me moving at 50 km/h, very very rarely are there any cars behind me as they are at a standstill trying to merge left asap.