A stationary vehicle is just one that hasn't moved in its previous turn. It's standing still and so is easy to board. For all other intents and purposes it's a normal vehicle.
Any vehicle that is immobilised becomes a stationary vehicle. Other than the fact that it's not moving it's just like any other vehicle.
Any vehicle that is immobilised becomes a stationary vehicle. Other than the fact that it's not moving it's just like any other vehicle.