This is absolutely correct . It assumes you want to arrive ASAP, although 8 lane highways look pretty tin on the ground in that neck of the woods. You would do better to look at some hiking apps e.g. my favourite, Wikilocs or Avenza. Find one you like and download it. This might help:Google maps will cheerfully route a walker along an 8 lane highway
Sage adviceGoogle maps will cheerfully route a walker along an 8 lane highway…
Most Camino routes have been marked out by people who have actually walked them. Just saying