Well, here is one way to do it. Not that I'd probably recommend...but it does get the descender out of the way.
But more seriously, one thing you might try is flushing the text right, tightening up the leading, and throwing a vertical rule next to the text. Depending on how the rest of the elements around this look, it might work...
By the way, what is the intended parsing of the words? Is this a stop for walking school buses, a bus stop for walking schools, or a school bus stop that walks? I'm guessing it's a stop where the bus stops to pick up walkers who have walked part of the way?