School Bus Rides

Hi everyone! Looking for ways to help my son keep calm while he rides on the school bus to and from school. I can say when he rides with me or on public transit he doesn't have any behaviors. Just on the school bus.

I should mention that he rides a van full of other kids. I'm not exactly sure how long the ride is but I wanna believe it's about 30-40 minutes.

I'm looking for any advice or ideas. What's everyone's routine look like. Anything I should try differently.