Here's an article about the self-driving trucks that were referenced in the OP: https://www.theguardian.com/technology/2016/apr/07/convoy-self-driving-trucks-co

Here's an article about the self-driving trucks that were referenced in the OP: https://www.theguardian.com/technology/2016/apr/07/convoy-self-driving-trucks-completes-first-european-cross-border-trip https://www.theguardian.com/technology/2016/apr/07/convoy-se... They still had drivers in them, but the trucks were automated (it doesn't mention if the drivers had to override it at times or not).