I think I may have lost track of my point, wheels, so I'll get back to it: that local authorities should take steps to reduce traffic congestion, both for the benefit of their residents and for the sake of reducing atmospheric pollution. This should include measures to get people out of their cars and on to the train (e.g. having sufficient parking at stations), and this should be paid for out of taxation because:
a) it benefits everyone, not just the train passengers, and
b) if train passengers are charged for parking they may go back to using their cars.