HRS §291C-42
How to pass cars coming the other way
When two cars are going opposite directions, each driver must move to the right so they pass each other safely. On narrow roads with only one lane each way, each driver must give the other at least half of the main traveled part of the road.
The statute, as written — Passing vehicles proceeding in opposite directions
Drivers of vehicles proceeding in opposite directions shall pass each other to the right, and upon roadways having width for not more than one line of traffic in each direction each driver shall give to the other at least one-half of the main-traveled portion of the roadway as nearly as possible.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.