The construction and maintenance guidelines established by this chapter should be followed as closely as is practicable in the construction, reconstruction, and maintenance of all highways, streets, and roads undertaken either by state or county authorities in the state or by individuals intending to dedicate these highways, streets and roads to governmental authorities. All deviations from these guidelines which affect highway safety shall not be made unless prior approval of these deviations has been granted by the director. Minor deviations may be made with the approval of the traffic engineer from the state or county agency having jurisdiction.
Haw. Code R. § 19-127.1-12