Crossword puzzle clue "sound of a train moving over railways tracks"

Sound of a train moving over railways tracks

Railways over the street

When Mary Walton invented sound dampers for elevated railways, she __

Sound from a moving train

Watch over and over and over and over again?

Model train company that REFUSES to face accusations that their faulty tracks endanger millions of imaginary tiny conductors?

Go off the train tracks

Tied to the train tracks, e.g.