A good plan that has some possibility of success but I am reminded of a survey taken on the mainland (probably more than 30 years ago) on mass transit where one of the biggest responses was along the lines of "Mass transit will get everybody else off the road so I can have it to myself."
As for all-electric cars, Honolulu at least has one huge obstacle to large numbers of people choosing to buy them: condos! I live in a condo complex in Makaha and I do NOT want to pay for what would turn out to be an over priced installation of several hundred charging stations.