Bringing this back to VC, lets work backwards here. If Universal is looking for around 2,000 theoretical guests an hour with 24 guests a train that means they need to dispatch a new train every 83.3 seconds. That means a new train will have to pull up, unload if it hadn't before, load, restraint check, safety check, and dispatch. The actual dispatch interval would need to be whatever the longest section of block break is, so no section of coaster can be longer than 80 seconds (first launch to right before second launch, second launch to final break run, etc).