Go back to straw bales....no there should be something that allows you to slow down and re join so it doesn't let you have an advantage. Some run off strips already have added obstructions which do this. or you have to go back to where you came off. They really shouldn't have set up a system...
It's a shame that tracks now allow you to go off for a couple of minutes then come back on having gained an advantage. The construction of the tracks should make this impossible. They have created a problem they are now having to sort out and after the race will always be unsatisfactory.