Transit and population and compact development! not just transit

The Minneapolis-St. Paul area has a great bus system and a noisy light rail system (I mean it's loud and those bell sounds are too much, even on one ride from Downtown to the Airport), but the area is pretty spread out.

Heavy rail, like DC's subway system, and compact development are the way to go.

(As well as NYC, Chicago, and Boston. And Philadelphia's transit system can be leveraged better for the rest of the city, not just the Center City and University City.)

The same goes for Baltimore. Baltimore has a great collection of transit assets that seemingly would augur revitalization. They don't because they aren't connected and don't link residential areas and destinations well enough.