Is there a known fix for multiple planes taking off and landing simultaneously? I've been working for a considerable time on groundnets for KMSP, CYYZ and KDTW. The flows seem pretty good with no observed clogging of runways or taxiways after running for several hours, planes are taking off and landing, and pushbacks are working decently. One major problem remains: Sometimes more than one plane will use a single runway at the same time and sometimes planes are landing while another is taking off.
Is there a known way to fix this problem? I read that you should try to provide several quick turns off the runways but am not sure how to do it: simply provide bidirectionally connected nodes leading to a taxiway? I have a rwyuse.xml for KMSP that enables two runways for takeoff and landing. It helps but the problem is still present. Are there other ways to fix the problem?