HRS §291C-121
Unattended motor vehicle
This law says what you must do before leaving your car unattended: stop the engine, lock the ignition, take the key, set the brake, and on a hill turn the front wheels toward the curb. It does not set any penalties.
everyone
The statute, as written — Unattended motor vehicle
No person driving or in charge of a motor vehicle shall permit it to stand unattended without first stopping the engine, locking the ignition, removing the key from the ignition, effectively setting the brake thereon and, when standing upon any grade, turning the front wheels to the curb or side of the highway.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.