The Smart ForTwo is the closest a manufacturer has come to George Jetson’s briefcase car. It doesn’t actually fold up, but it’s so small that you don’t have to. It’s shorter than many cars are wide, so you can nose it into a parallel parking spot. It’s so narrow that you can practically fit two of them in a single lane, and as safe and clever as Smart’s corporate parent Mercedes-Benz can make it. It’s not for everybody, but if you’re a mass-transit commuter longing for personal transportation, this is the perfect ride.