Why do cars stall on railroad tracks?

Answer 1

What I have heard is that the train wheels on the tracks both being metal cause a magnetic pull. This will stall out a slow moving vehicle, or rather a vechile that's engine is turning at a low RPM.

If your theory were correct you would see this scientific event happening all the time. The truth behind this issue is there once was a time when vehicles had their starters positioned low enough that as a train approached, the magnetic field induced from its movement along the tracks created a strong magnetic field, powerful enough to effect the starter of a vehicle that passed through it, effectively stalling the motor.

This problem was of course corrected by repositioning of the starter.