hey. i created an airport as i said in my other post about making the are flat which i still havent resolved, but anyway i have another question. how can i make air traffic control use all the runways at the airport, or at any airport, where crossing runways can be in use at the same time. i say the same time meaning just being able to use them, not using them simultaneoulsy to make for a collision  .

thanks in advance!!

yea i mean so you can use them all at once. because i've watched planes land and takeoff from philadelphia intl (KPHL) and periodically between takeoffs and landings on the main parrallel runways (9L, 9R, 27L, and 27R) there are smaller planes like Dash 8s and CRJ's and stuff of that sort that land on the crossing runway (17, 35) i have downloaded a new version of KPHL, which says that all runways will be in use but i havent tested it yet. i was just wondering how you can activate the crosswind runways and have planes land and depart in between takeoffs and landings on the main runways.