This stretch was recently bypassed by another two-lane road, which now carries the route 83 designation. Some mileposts include their approximate metric equivalents.
Metric signage is otherwise rare or nonexistent on Hawaii's highways.
An example of a shield for Hawaii's usually unsigned 4-digit state routes, this one at the southern junction of Oahu's Farrington and Kamehameha Highways. Hawaii's 4dis seem to be minor roads that otherwise would not be in the state highway system, but were added because they were improved with Federal funds. Old, and really old, style state route shields. The cutout-style shields below are sometimes found on former routes long removed from the state highway system, as with old routes 15 and 151 in Pahala on the Big Island. . Shields on county routes are usually identical to state highway shields.