Just apologize. If that person is actually your friend they'll forgive you

I don't understand this. If they are not wrong, they should not have to apologize.

Hopefully you'll manage to patch things up. If you're best friends, it's worth the effort.

There's more than one way to travel. Use the bus or train. And if you are up in the middle of nowhere, use your legs to get to a bus or a train. However if you got luggage you are screwed, whether it be emotional or literal luggage.

That's what Best friends are for, you fight and argue then at the end forgive each other. Just apologize I'm sure your best friend will forgive and forget.

If y'all knew each other long enough to become best friends, y'all can handle 3 hours in a car together.

3 hours to attempt to reconcile.

Hmm, sounds to me like you might be trapped in a road trip/buddy comedy. I'd be on the lookout for wacky gags, an omnipresent narrator, and forgotten items that may necessitate turning the car around and prolonging the trip.

In this case, silence is golden, and music is platinum.

If you're a male...get over it.
If you're a female...good luck.

Just do something (like play a song that brings good memories) that will possibly cheer him/her up. Be the bigger person, and if that person is really your friend, they'll forgive you sooner or later.