The suburbs already exist. The high-rise buildings with untold numbers of jobs already exist. Sure, you can add 1000s of apartments around the light rail, but that just brings in 1000s more people and 1000s more cars that they leave parked somewhere while they may or may not use the trains. Now, one thing that might help all involved are more shuttle buses from park and rides so that people don't have to drive their cars to the stations.