Workers wearing reflective vests working near a train car .
Chances are slight that reflective vests on workers make them visible to the approaching train while they work on a train car .
There is a very good chance that reflective vests on workers make them visible to the approaching train while they work on a train car .
Chances are slight that reflective vests on workers make them visible to the approaching train while they work on a train car .
Reflective vests on workers make them visible to the approaching train while they work on a train car .