To me it’s always seemed that a train can dispatch after it’s passed the block brakes before the slow right-hand turn next to the maintenance shed.
Back in 2009 sort of time, when the park was heaving after Saw opened, the operators on the coasters used to count down over the tannoy, and often the trains would be ready to go and would have to actually wait to be sent - the operations back then were incredible at times. Inferno would regularly dispatch before the next train had to come to a stop.
I remember very regularly coming back to the station and watching the dispatched train in front fully leave the station and be out of sight round the corner as we rolled in without stopping.
I’ve never seen it dispatch earlier than that though - I suppose in theory the lift hill creates a block doesn’t it? So I guess if it would be setup to do so, a train could be sent before the other one reaches the first brakes as the lift hill would stop if the block ahead (the main layout) isn’t clear by then?
Not a lot of point though because realistically it’s rarely going to be that quick, and would literally save a couple of seconds at the very best