The Milwaukee Journal Sentinel has an article about what the region needs to do. It's a good push but the following should never be the start of a regional system.
Minimizing capital costs by extensively utilizing existing rail rights of way.Existing rights of way mean commuter rail but before commuter rail is implemented, a good central city system needs to be in place to get people to all of their destinations. We're learning this from systems like Houston where an extensive core system is going to lead to a much more effective commuter rail system. This is also evidenced in the large rail cities like Chicago, Boston, New York, and DC. If you don't have central circulation, the commuter rail doesn't work as well. So cut it out already and do it right. We've learned so much in the last few years, why do we want to keep going down the same path?