To get to Botswana from Zambia, we crossed the wide Zambesi River in a motor launch. This is the only place in the world whether the borders of four countries come together. You're standing in Zambia, to the right is Zimbabwe, straight ahead is Botswana and to the left is Namibia.
There was also a ferry there and about a dozen trucks waiting on the Zambia side to cross. As we reached the Botswana side, there was a long line of transports - I'm going to say about 2 kilometers.
The ferry takes one truck at a time. One. Truck. At. A. Time.