Thanks for that. I think there is likely to be more ridership than the CAHSR schedule contemplates in the origin/destination pairs in the "tail" of the ridership distribution, especially in the CV, so put more emphasis than they did on building up the all-stations frequency ... but yes, going from a two-tier to a three tier Express, Limited, and all-stops would also add tph.

All of which says that an upper ceiling of 6tph is awfully low ... and the incremental cost of expanding the box, that is, the addition to the cost from doing it in two stages, can easily be greater than the original cost of building the three-island box in the first place.


I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.