Slap a roof on it and make it an elevated bike highway. Lower construction cost. Lower maintenance. Better environmental, health and stress impacts. It's only 12 miles...that's not even a half an hour bike ride. Plus don't need to worry about what to do when you hit the end of the line. Hawaii is not the same as the continental US. We should be thinking about more original solutions rather than copying a failed metropolitan system. Every major metropolis puts huge amount of money into their rails systems, and most of them don't seem to work that well. Is that really the route we want to go?  Or something even better and more progressive?