HRS §264-45
Which lighting rule wins when state and county rules conflict
When a state highway lighting rule and a county rule disagree, the stricter one applies to new lighting installations. This only happens if it is practical and does not break safety rules or federal law.
countiesstate agencies
The statute, as written — Highway lighting
To the extent that it is practical and not in conflict with any safety regulation or federal law, regulation, or mandate, if any highway rule or standard relating to highway lighting conflicts with any county ordinance or other rule regarding highway lighting, the more stringent requirement or standard shall govern all new installations of highway lighting.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.