My dogs have seatbelt harnesses for short drives. If the drives are really really short, then I won't make them wear them. For longer drives, I crate them.

When I transport shelter dogs, they are usually crated, but sometimes either free or harnessed up in a seatbelt.

Reece always wants to ride on my lap but I get paranoid about accidents so I have to make him get in the back seat He's so funny. He can't stay conscious for longer than about 60 seconds in a car. He totally just conks out asleep.