Phil I think that technology -everything from mobile phone apps, GPS, bike sharing schemes, ebikes, Uber/Lyft and potentially in the future autonomous vehicles means a mode shift away from private car ownership land/transport considerations. This mode shift will supplement traditional rapid transit services in a way that will expand the catchment area of articulated density found around transit stations. London already has much of this technology in place -it needs the planning rules to change to maximise the benefit.