I am with
@kazrobbo and
@Galloglaigh2 on this, which doesn't really help the OP. Sorry about that.
I walked from Canterbury and my wish was to walk all the way. If this meant necessarily walking on a road on occasion, I took this as the hand I was given.
I happen to be going tomorrow to walk in the Derbyshire Peak District for a few days, and I will not expect to walk on ANY roads. For me they are quite different undertakings.
I don't feel constrained to always necessarily follow the route the book or the GPS is directing me to. I like the freedom to look at Google Maps and see what other options there are if, for example, I am particularly tired or the rain is heavy. If walking on the road is a lot shorter, I will add that to the mix of information when making my choice. I don't remember ever feeling in any danger on any road I have walked on and I have sometimes walked 20km on a paved road without a vehicle passing me. I have no objection whatever to walking on tarmac as a surface. And there were times when I was fording the tenth river of the day in Albania last month, and sliding in deep mud, when I longed for tarmac.
In Portugal, I never found the infamous cobbles - a frequent source of expressed sadness in this forum - any problem. The fact that the local people seem to manage them , and have done for centuries, makes me feel they cannot be quite as bad as some people think.
If I recall correctly, on the
Camino Frances, as you leave Villafranca del Bierzo, going towards O Cebreriro, there is an alternative path to the right via Pradela, and there is the main road route (with separate pedestrian track) (and a third alternative to the left, the Dragonte). I did the second in very bad weather one year and was keen to do the first another time when I was walking with my nephew, young and superfit, a black belt in karate. He baulked at the sign where the first and second paths diverge, stating that the alternative was 'steep and only suitable for fit people'. I couldn't persuade him to give it a go. Then a woman aged about 90, in bedroom slippers came down the steep path, to do a bit of shopping. That brought the argument to an end. I am always encouraged by what I see other members of my own species accomplish.