I think in large metro areas they should put thru traffic in the left lane. This way they won't interfere with entering and exiting traffic. Some one always seems to be in the left lanes trying to get around a couple of more vehicles. Then they dive for the exit causing everyone to get on the brakes which then dominoes.
I remember following a couple of side by sides across I-10 in Louisiana for over 10 miles. Finally a cop sped through a rest area to get ahead of them instead of pulling one of them over. Talk about ticked, what are the chances of me getting a ticket for doing that? I cancelled spending my money in their state.