Here's a better approach that uses 1 power pack per lane, which eliminates power drain from one lane upon another. Use with jumper wiring shown below to minimize power drops as your car moves away from the main terminal track.
Jumper wiring diagram to minimize power losses around your track. Just remember to connect terminal screws 1 to 1, 2 to 2, etc. and you'll have it right.
T-Jet wiring diagrams reprinted from an Aurora thunderjet service manual.
If you want to use the old Aurora Vibrator steering wheel controllers, this wiring diagram from an old Vibrator service manual should help.