Having a Subway or metro system like Chicago, NYC or even San Francisco, would lower drunk driving because people could take the train. It could increase the speed of people going from downtown to Allendale. We could slowly build these systems out to the different suburbs so you could take a 30 min train ride to Holland for the day, not worry about parking. Spend time there and come back without the cost of gas, parking, less driving accidents etc. Even if this was a small monorail system just in GR proper. That went around the various sides of the city, it could make getting around in the winter easier too.