Simple Q - why are some French motorways tolled but others not? And for that matter some parts of the same motorway free, others peaged? Seems no rationale for it, but assume there must be a national, company or regional policy? Thought it might be to recoup the cost, but having travelled the A75 for nowt [apart from the Milau viaduct fee] which must have cost a fortune to build I figure it can't be so. Anyone know?