HI SB2954

Requires the Hawaii Department of Transportation to complete a traffic engineering study before installing traffic calming devices (speed humps, speed tables, raised crosswalks, chicanes, curb extensions) or changing posted speed limits on state highways, effective July 1, 2026.

Mandates creation of a publicly accessible online dashboard displaying all traffic safety requests, engineering studies, public comments, and final written determinations, with entries maintained for at least five years.

Requires 30-day public notice and comment period before implementing covered traffic safety actions, with all public comments summarized and addressed in the final determination.

Establishes a five-year deadline (July 1, 2031) for the department to complete retroactive engineering studies for traffic safety devices installed since January 1, 2019, with devices lacking validated studies subject to removal.

Requires annual legislative reports detailing all implemented traffic safety actions, engineering studies, public comments received, and progress on retroactive compliance.