I hear the main text of this PSA in a decidedly snarky voice. “Step over the gap, not in it.” Let’s try a few enhancements.
“You might want to try stepping over the gap. Just saying.”
“If you’re into tripping as you enter a train car, you could do this. Or you could step over the gap. Your choice.”
“Uuuuummmm… heLLOOooo??? The gap?? Step over?”
“Here’s a tip: step over the gap.”