I bought a Automotionfx car and two pieces of track. The Automotionfx track is laser cut and engraved on Glowforge medium proofgrade draftboard. I assume on a Glowforge laser cutter. So making custom track should not be a problem on my Glowforge.
Making a switch point for a bus stop could he done by using a DZ-2500C to alter the underside wire direction. An electromagnet disguised as a sewer cover triggers the reed switch on the bus to temporarily stop the bus.
I can elevate or lower the roadway by cutting a living hinge across the track that is unaffected by the underside grooves.