In the US we drive on the right. Those that drive on the left will have to make a mental adjustment to my descriptions.
Most states in the US require heavy truckers to drive on the right (outer most) side. The problem is that the road surface in
that lane breaks down faster and has a more uneven surface causing a bumpy road at best, and a pothole damaging drive at worst.
The problem starts when some twit drives slowly in the next lane. Twits (see page 9 of the drivers manual) think that by driving 20 miles per hours under the speed limit is safer.
The contrary is true. People expect that those in the center lanes will be going
at least the speed limit. In a very short time they have to decide which way to go around the "twitter". That or suddenly stomp on the break causing the car behind them to rear end them. The "twitter" looks in the rearview mirror and shakes their head at all the bad drivers.
Now I'm not condemning all the old slow drivers. I figure that they know that they're unable to drive above a certain speed. I just wish that they would stay out of the middle lane!