When I was driving the Seattle gridlock, I was pissed off by their highway design of putting the HOV lanes in the right-most lane. This caused a mess during rush hour as merging traffic had to merge through the HOV lane and into regular traffic, slowing down both the HOV lane and regular traffic.

I’m encountering a similar problem on the 403 now. Between where Mavis and Eastgate, there are a lot of cars coming onto the 403, who like me want to get over to the fast lane. At the same time, the are a lot of cars in the leftmost lane, which is the HOV lane, who need to exit. So you have cars trying to merge across 3-4 lanes in both directions at the same time. Would the Seattle system be better in this case? Probably.