Signs posted pursuant to this subsection shall be plainly visible at all times under ordinary traffic conditions.
"Construction area" includes any area in which there is occurring the installation, construction, or demolition of connections for streets, roads, driveways, concrete curbs and sidewalks, structures, drainage systems, landscaping, or grading within the highway rights-of-way, including aboveground and underground utility work, excavation and backfilling of trenches or other openings in state highways, the restoration, replacement, or repair of the base course, pavement surfaces, highway structures, or any other highway improvements.
"School zone" means every street and all public property in the vicinity of a school as designated by the department of transportation and the counties, in their respective jurisdictions.
HRS § 291C-104
Violation of rules governing the use of traffic control devices at work sites; penalty, see § 286-8 .