Hour and a half from Hilo to HPP

[HereOnThePrimalEdge]

I don't see how the time spent in traffic on the highway will be reduced after the extra lane to Shower is completed. Almost no cars exit the highway between Kea'au and Shower, so the same amount of cars will merge into a single lane, either at Kea'au or Shower. It may feel less congested though, as there will be two smaller merges instead of one big one.