Oahu is amazing in this regard. I know I posted ad nauseum about this about 9 years ago when we came back from Hawaii, but it bears mentioning here. We didn't rent a car, just bought a monthly bus pass. We were there for only 3 and a half weeks, but it seemed worth it. Forty dollars for unlimited rides. And they went everywhere! Like, stops in the middle of a plantation. Nothing but pineapples as far as the eye could see. Very agro, but with a nice little bench on the side of the road. Even though there were sometimes no passengers waiting to get on, but the bus would make its appointed stop, open the door, and wait for a few seconds before closing it and moving on. I've long been a fan of increased funding for public transit, and this seems like a good time to mention it.
Also, although I've posted it many times before, for the sake of completeness I'll do it again: the driving age ought to be about 30, and the test needs to be much more comprehensive and expensive than it already is. High school students have no business driving cars. Ever. University students as well. And, yes, to be honest there needs to be some re-testing at the other end of the age spectrum as well. I know I posted about how an octogenarian ploughed into me about a year ago and smashed my car. Yes, I'm happy that I got a check from her insurance company for more than I paid for the car, but I'd have been even happier if that woman had a better way to get around than driving a private car. Only way that's going to happen is if we start taking public transit more seriously.