If you are talking about bus transportation to and from school team sports events, there is a charge here for that transportation. It was $75 when my son played high school baseball back in 2005 and I don't know if they had grants to help kids pay for that. It was a private Catholic High school and they did offer scholarships to help pay the $11,000 a year tuition, so it is entirely possible they had grant money for buses too.
If you are talking about bus transportation between school and home, that went away here a long time ago (like 20 years). We have open enrollment here, so it would be impossible to even come up with a route for the buses. We have 44 houses on my street, and none of the kids attended their default home school. They were scatter among 6 other high schools. Funny thing is, the Principal of the home school lives on our street. His kids didn't go to his school either. I suspect part of it was because he was Principal, but both his kids were in the IB programs, and his school didn't offer those classes.