Its hard to compare UK with France where there is a much lower density of traffic and using N roads is a viable option, maybe not as comfortable and a bit slower than Motorway but usable. As far as I know there are no tolls in Germany or Netherlands. We are so crowded here that a whole new Toll motorway infrastructure would be unrealistic in terms of land acquisition and bearing in mind attitudes to climate change it would be Political suicide for any party proposing it