It is only 2-lanes normally until you get close to a big city or interchange when it goes to 3 or more like in the states. The left lane is for passing ONLY. You are not to drive in that lane and can be ticketed for it *technically* if you aren't hauling the mail. The biggest thing is that trucks are NOT allowed in the left lane at any time unless marked to do so.
Also the speed limit in most areas around big cities is still 140kph/85mph so it's not like they are restricting much.
It's just a different mentality and RESPECT for the road unlike in the the USA. They are on the road to DRIVE not talk on the phone, paint face, eat, read, etc...