The problem is that for whatever reason rail users ""don't count"" politically.
This is all fine and dandy until enough people decide to travel by car, and eventually there are traffic jams making you virtually unable to travel (by car) at certain times as well.
Looking at number of trips/head, surface rail was 13 in 2002, rose to a pre-pandemic peak of 22 in 2018 and fell back to 15 in 2022. Bus (London + non-London local + long-distance) was 74, 48, and 37 respectively; motoring (car driver + car passenger + motorbike + taxi) was 694, 614, 512. Overall was 1074, 986, 862. So rail had a modal share of 1.2%, 2.2%, and 1.7% in 2002, 2018 and 2022.
The distance measure looks similar for rail: 482, 683, 493, from 7193, 6530, 5373. Modal share 6.7%, 10.5%, 9.2%. (I haven't done separate sums for buses and motoring.
So at least since 2002, it looks like rail has had a small but growing modal share of a steadily declining travel market, until disrupted by Covid to a place below peak but still considerably ahead of where it started.
Caveats: I haven't included the tube, and these data don't disambiguate light rail systems from 'other' (including flights). Rail remains dominated (like bus travel) by London & South East commuting, at least in number of trip terms.
[1]: https://www.gov.uk/government/statistical-data-sets/tsgb01-m...
In order to make driving less attractive than mass transit outside of urban cores like Manhattan or London, driving would have to be made more costly via increased tolls, removal of parking spaces, and less road capacity in conjunction with mass transit being made more frequent (every 5 to 10 minutes) with more routes.
Point to point travel in an individual vehicle is just very hard to compete with, especially on amount of freedom.
I have to go on a cross country journey this Sunday which would suit the use of the train, except there are none at all on my section of the main line early in the morning, so I shall drive all the way into London. The data may make it look as if no-one needs or wants to use the train early on a Sunday, except we might, if we had the option.