From the article: > The trucks did not travel in platoon for the entire journey — only on motorways when traffic conditions were "normal" — and each vehicle, e

From the article: > The trucks did not travel in platoon for the entire journey — only on motorways when traffic conditions were "normal" — and each vehicle, even those following the lead truck, had a human driver on hand. Also, the convoy formed a network and explicitly communicated with the goal of not just driving autonomously but also recognizing cost savings: > a Wi-Fi connection keeping their braking and acceleration (but not steering) in sync. So quite a bit different from just lane keeping.