This is something that comes up from time to time and it simply isn’t feasible to have mileage based pricing.
@yorkie asked the following questions when this was last discussed.
1) Please give me the proposed fares from York to Whitby for a day return, avoiding Darlington, and tell me how this fare is calculated and whether you think it will be competitive with the coach service provided by Coastliner that costs only slightly more than the current rail ticket price but offers a shorter journey time? Also if I was to start the journey at Church Fenton, would that add to the cost?
2) Please give me the proposed fares from York to London for a day return, and if this is lower than current prices, tell me where the revenue will be brought in to compensate LNER for the revenue loss?
3) Please give me the proposed fares for a return from Peterborough to Leicester, and also Peterborough to Nottingham, and let me know how you are calculating the mileage and whether under your system it will be permitted to travel from Peterborough to Nottingham via Leicester or not, and if someone does go via Leicester what excess will be charged (if any)?
4) Please give me the proposed fares for a return from London St Pancras to Ashford Intl (and any routeing options you wish to provide) and would those fares apply from, say, London Charing Cross to Ashford Intl? Please give me your calculations for different termini, if they vary..
It is a bit sad that suggestions of 'mileage' based fares seem to elicit irritated confrontational detail questions from forum fare experts, why is that?
Of course, any fares simplification is going to be very complicated, and possibly in danger of merely exchanging one complicated system for another. However, if a reasonably transparent system with a minimum of anomolies, then a system based on mileage would seem to be a possible solution. However, it would not be that simple, so I will attempt to suggest a way forward hopefully without raising too much ire.
I would assume that a simple cost by mile is not practical, but would have to be a banded scale, so short journeys are not too cheap and long journeys too expensive i.e [and the values are merely indicative] First mile £2, subsequent miles to 10 miles - 50p per mile. 11-20 45p per mile 21-40 40p per mile, 41-70 35p per mile gradually working down to 501-700 at 5p per mile. Some pretty detailed modelling would have to be done to determine the actual values, and the precise banding. Peak tickets would be a % increase on these rates.
Where there are multiple permitted routes then an average of the available mileages would be used. In some circumstances (particularly where one or more of the permitted routes would only be used by a passenger in infrequent circumstances] this could be an evidenced, published, weighted average.
In the circumstance that the railway takes an indirect routeing compared to the competition (which in terms of number of passenger journeys likely to be made will be very small) either (a) the railway has to suck it up (such as Pwllheli-Bangor) and not be competitive, or (b) a lower published 'tariff mileage' could be permitted between the two points, and any other intermediate fares capped at that tariff mileage. So in question 1 the York-Whitby fare could be capped at a tariff mileage, which would likely cap the York-Goathland and Thirsk-Whitby fares too. To get a Church-Fenton-Whitby fare you would add the Church Fenton-York mileage to the York-Whitby tariff mileage. These complications to be kept to a minimum.
Question 2 is just adversarial. If the York-London fare is lower than it is at present, the loss will be made up by other fares which will be higher.
In Question 3 - there is only one route from Peterborugh to Leicester, so the normal mileage scale would apply. A ticket from Peterborough to Nottingham would normally be routed via Grantham. Travelling via Leicester would possibly require a more expensive ticket for that mileage, as passengers would not normally travel that way nowadays. If someone wanted to travel via Leicester with a via Grantham ticket they would be charged an excess of the difference between the two fares, presumably.
For use of high speed (or any other special) lines an inflated tariff mileage could be used. In question 4, travel on ordinary trains from Charing Cross or Victoria to Ashford would be calculated by an average mileage of the available routes normally used. See no problem also in weighted 'averaging' the (former SR) terminals into one fare. Separate tickets for the HS line charged at a higher notional mileage.
The York-Sheffield fare mentioned in #17 would be a weighted average, due to the paucity of service (and therefore passenger use) on the Pontefract Baghill route.
Of course it is not possible to make an omelette without breaking eggs. There will be howls of protest. But everyone's fare cannot stay the same or only go down, with no anomolies, for simplification, without a lot more subsidy. After publishing the scheme I would then run away in exile to Patagonia.