I used to live on Kalihi Stream past Tin Roof all the way up behind the dojo (where they had two dozen fighting roosters at the back of their property -- Buddhists! go figure!)  I agree the simplest and least costly solution is to flatten out that curve.  

Then they should put a squad car in the weeds there for a month or so and issue a bunch of speeding citations as a "traffic calming measure".

Of course I'm a motorcyclist so I rather enjoyed straightening out that curve every day.  But hey, not fair to be selfish and there are many other nice curves to play with.