I think the safest guideline to this should be: -Faster car must first catch up with the guy ahead and then expect to be allowed to make an uncontested passing move at next chance. -All the slower car needs to do is to leave plenty of room on the inside at next safe turn after the fast dude have caught up. This way we will avoid unexpected behavior (who shall move off the racing line etc), and we also avoid cars slowing down way below race pace (which can be dangerous). In addition I think this is what will make the sum of time loss for the two cars a minimum. Do people agree with this, or would you change some details, or do you think I am way off? Voice your opinion so that we can all agree on how this sould be done.