IRT "Ban cars from Kalakaua Avenue"
Not enough, perhaps.  We would have no borders and too, be a sanctuary city.  So, Waikiki should be made a "safe zone" no less than in solving the homelessness problem.  Ban not only cars, but also, all locals from Waikiki as safe zone from the tourists.  In that way, tourists will only harm themselves and locals kept safe from especially the "illegal tourists."