Do roads have place in national parks? If so then cell towers also. I mean if I see asphalt then it is quite reasonable to expect also cell service. I was i n

Do roads have place in national parks? If so then cell towers also. I mean if I see asphalt then it is quite reasonable to expect also cell service. I was i national parks in Europe and I always got cell service. I might be lucky (considering the article and posts about Germany) but in US I was in one park (actually two, but I don't remember situation with mobiles in one) and I did get cell service even before the gates. I don't expect to have cell service if the park doesn't have roads, just hiking tracks.