This is a good option on a single lane empty road. I've done it while driving as well as cycling. But if it's a four-lane busy road you cannot easily re-integrate with traffic after pulling aside, and there will always be another car that ends up "stuck" behind you. If there are four lanes, cars should be patient and pass on the left. If they honk, and you live in a country or state where the driver probably won't have a shotgun in the back seat (couldn't help taking a shot at the Americans here ) I would be tempted to flip the offending driver the bird --- this is probably the one hand signal he'll understand!