What's more useless than a full-scale public transportation system in an unlivable metro area? Does anyone think that the so-called "tren urbano" will pay for itself in the next 1000 years?
Why didn't intelligence prevail and fund (cheaply!!) an interisland bus system? Could have started out with two buses and two drivers, circling the island in different directions each day. How much difference do you think that would have made after 10 years. Service with more drivers, hardware and routes would have paid for itself. Instead, you have a tiny area choking on gas fumes.
DM