The buses I've seen are still capable of going under their own power, and they can easily attach/detach from the wires: https://www.youtube.com/watch?v=9k1z10U3

The buses I've seen are still capable of going under their own power, and they can easily attach/detach from the wires: https://www.youtube.com/watch?v=9k1z10U3utc https://www.youtube.com/watch?v=9k1z10U3utc So detours and overtakings are no big deals.