Signal cursed trains to their matching portals without a pile-up.
1 / 2 / 3 or clickCycle each lane's diverter at the junction: STRAIGHT → DOWN → UP (wraps around).Read the sigilEach train's colour must reach the same-colour portal: red top, purple middle, cyan bottom.SPACE / A / right-clickSlam the time brake to slow every train while you set the diverters (it recharges).Don't pile upTwo trains nose-to-tail on one lane haunt the yard.M / PMute / pause (while playing).
A train crossing the junction follows that lane's diverter. Set it for the front train, then reset for the next.