>solving the last-mile problem. I think the only way you can hope to achieve this is through zoning and long-term alteration of how cities are built. Sprawly c

>solving the last-mile problem. I think the only way you can hope to achieve this is through zoning and long-term alteration of how cities are built. Sprawly cities like Houston et al. can't possibly hope to build out any right-of-way based system such that everyone is within a mile of a station...thus you build the center and let density rise. Combine this with a suitable number of edge-sitting mega stations that outlying folks drive (or, even better: ride a bus) a shorter distance to (relative to a full commute) and you've solved a large portion of the problem, anyway.