"There are very few major metropolitan areas in the country that aren't considering the installation of some sort of light rail system," says Robert Puentes, a transportation expert at the Brookings Institution. He stresses that the car is still king, but says politicians, businessmen and developers are looking to light rail to help guide development.
"Light rail stops create nodes and create opportunities for denser development," says Frampton. "So you don't end up using up roads and using up sewers, and building new police stations and water lines and so on."
Light Rail Transforming Cities, Guiding Development : NPR
And people that actually need transit get left behind, of course!