Road to where?

According to some of those top ten lists, Honolulu is the second worst US city for traffic, and I believe it. Getting around is not hard, but geez it can be slow, and not just at pau hana—Hawaii’s afternoon peak hour. One time, driving east along the HI, we were just a couple of miles from our exit when Morgan Freeman on Waze alerted us to a problem ahead and suggested it would be quicker to drive to the other side of the island and back down the Pali Highway—a detour so long we stayed on the H1 parking lot! One time we needed to change our rental car and ended up in Pearl City because, due to a typo in the driving instructions, we were looking for an exit that didn’t exist. We also found this rather interesting direction. Where does that mystery turnoff to the west go, I wonder?