Same in the UK although unfortunately, the per-person cost is roughly linear on the railway and not in a car that will only need slightly more fuel per extra pe

Same in the UK although unfortunately, the per-person cost is roughly linear on the railway and not in a car that will only need slightly more fuel per extra person. I guess the only way round this is that the per-person cost should be so much cheaper on the train that a car only makes sense with, say, 4 passengers. The thing is, most people already own the car so they don't consider tax/servicing as part of the cost of travel whereas on a train, this is all added to the ticket and the servicing is pretty extreme on the railways.