1. Longer steps can be run in parallel. One step of 24 hours with 1000 in parallel allows 1000 cars per day. 2. If no parallel allowed, 86.4 seconds is the ave

1. Longer steps can be run in parallel. One step of 24 hours with 1000 in parallel allows 1000 cars per day. 2. If no parallel allowed, 86.4 seconds is the average not the maximum. Longer steps balanced by shorter steps.