> This is a huge expansion. Being brave enough to build rings is great: most capital cities obsess with spokes to existing hubs, or like the Elizabeth line do a

> This is a huge expansion. Being brave enough to build rings is great: most capital cities obsess with spokes to existing hubs, or like the Elizabeth line do a single slash across. The equivalent in London would be the Overground which while largely cobbled together from existing tracks was a huge improvement. If you change you can even go in a ring. The projected ridership for these new lines in Paris looks to be about triple that of the Overground. The Elizabeth line (along with Thameslink) is more like Paris' RER.