Perth Departures and Arrivals.
Maybe for the not to distant future we could lobby the Feds for a 21 parallel runway to suit turbo props only. Much cheaper than a full blown runway for all types of aircraft. Also using left and right turns for aircraft departing on different routes could clear departing traffic more quickly. What is wrong with joining some SIDS from over the top after a turn. There are alternatives if the tower is given some airspace.