Cliff suspected that as an older dog he probably got spooked by the weather and wandered away from home so I went back to the intersection where I found him and did a little sleuthing to find his home and owner. Well I got lucky and managed to find them. When I reached them by phone later in the evening they told me that, yes, he had just been in the shelter the week before after wandering away from the house during a storm. We discussed their need to start fencing him even though for his entire life they had never had to do that.
Just like us, dogs personalities, needs and desires change throughout their lives and extra attention is needed as they age. I would have been devastated had I not been able to stop in time on the highway as anyone would have and Max's owner and I agreed that certainly fencing him or tying him was a much better alternative than putting him at risk every time a storm blows through the valley.
Love your dogs and keep them safe! Max, so glad I found you and helped get you home.