@Taueva, I find it funny that my initial challenge to rail opponents, for them to come up with a realistic solution to what we are really facing, transportation wise, on Oahu, has me now being labeled someone who is "strong supporter of public transit". Let me make clear that notion, I am a person who is a strong supporter of transit solutions. If that includes a public transit element, so be it. What I am looking for is a solution that answers this question - how to move people on this island efficiently, timely and properly with an infrastructure that is designed for a population of 500 - 750,000 when the population of Oahu itself, by 2019 or so, will be one million people with approximately 850,000 registered cars, which will uptick as the population continues to increase. 
But to answer your question, my wife and I have one car, and I occasionally use public transit for, among other tasks, going to and from the airport. On the mainland, I use public transit all the time.