@Shem Lawlor:  Rail isn't the only solution to our current and future traffic problems.  If anything, it only encourages more people to live on the west side of Oahu resulting in very little net benefit.  If you want real solutions to traffic, you either need to get people to stay at home (telecommuting or online schooling) or you take human error out of the equation (e.g. driverless cars).  We don't need to spend Billions of Dollars on rail.  I expect within the next 10-20 years, driverless cars will become the norm resulting in very few accidents (of which most will be caused by people actually driving their cars manually and recklessly).