17 cars on a 7×8 lot. 55 seconds on the clock.
17 cars left
You have 55 seconds, starting at your first tap. A bump costs 3 seconds.
Drive the cars out in this order: 1, 2, 3, 4, 7, 14, 15, 17, 11, 10, 9, 13, 12, 16, 6, 8, 5.