mjbow
clearance to IFR, ON THE GROUND
There is no route segregation so almost impossible. Give us a proper SID/STAR system that automatically segregates traffic with arrivals vs departures and then can get a clearance on the ground with little problem.
We dont know how long it is going to take to get airborne, by which time the traffic situation has changed. Once a level has been given away it blocks it off for anything else, i.e. the arrival gets kept up high. Also, I have seen some strange manoeuvres on departure, for example turning south and doing a 270deg right turn and head northbound from the overhead. We cant give away the whole of E airspace with a clearance on the ground.