Numbering of O'ahu's highways

[Short n Swift]

https://hidot.hawaii.gov/highways/home/oahu/oahu-state-roads-and-highways/

The more I look into this, the more confused I get. Of course the mistakes in route numbering on Google Maps for routes 801, 803, and 830, none of which exist and all of which are on city owned roads. There's also Route 65, which was apparently signed 630 in 2010s and is back to route 65 again. There are only 3 remaining three digit roads: Kunia Road (750), Fort Barrette Road (901), and Farrington on the north shore (930), each could be replaced with 2 digit numbers in 75, 91 and 82.

Most of the existing and new roads are 4 digit numbers, such as Lahaina Bypass (3000, on Maui but still HDOT) and North-South Road. Harbor Access Road is expected to be either route 94 or 9400, but it's not clear. There are also "ghost" routes such as Route 95, or major four digit number highways such as Route 7101 that should be Route 70/71. Last but not least, look at the bottom: "74140" for Notley Street. 5 digits??

The question is, what is up with the numbering of these roads, and how are county highways (like Kamehameha Highway in Kaneohe and Haleiwa) actually numbered? How did these route numbers come about in the first place?

[Max Rockatansky]

On Oahu is based on highway numbers with the first two digits in the range of 60-99.  This was part of the larger numbering scheme set through the Hawaiian islands.  Three digit highways more or less functions as secondary state highways.  Four digit highways can be found on other islands and tend to be modern additions.  A lot of the four digit highways don't have route signage.

[oscar]

^^ Also, not many Hawaiians seem to care about route numbers. Long ago, HDOT may've cared, but that may've fallen by the wayside, and route numbers may be just for internal route inventory purposes. Strange numbers like 74140 (non-state-maintained NHS road related to 7414) tend to be unsigned anyway so the public isn't going to complain, or get route numbers only to satisfy Federal bureaucrats.

The nifty statewide route system Max summarized was created by the Feds pre-statehood, before anybody realized that Hawaiians (and Alaskans) generally don't have much use for route numbers.

[Short n Swift]

^^ Also, not many Hawaiians seem to care about route numbers. Long ago, HDOT may've cared, but that may've fallen by the wayside, and route numbers may be just for internal route inventory purposes. Strange numbers like 74140 (non-state-maintained NHS road related to 7414) tend to be unsigned anyway so the public isn't going to complain, or get route numbers only to satisfy Federal bureaucrats.

The nifty statewide route system Max summarized was created by the Feds pre-statehood, before anybody realized that Hawaiians (and Alaskans) generally don't have much use for route numbers.

True, although I think there's a few that resonate with locals. 76 or "76 South" for Ewa Beach, "83"/"99" for Kam Highway (moreso 99 because it's a nice number) and maybe "72" for the east side, even in Wahiawa "Exit 8" is a pretty big thing. Haven't heard of "93 West" or something similar for the Waianae coast, or for any of the two Windward highways. Most locals just call it by their actual names (even H201 is just "the Moanalua" to us).

That said, I do wonder what a "74140" shield would look like. I don't think people who live there would complain, considering many people know it leads to Fort Shafter's back gate, but it'd be cool.

[Scott5114]

That said, I do wonder what a "74140" shield would look like.

Too bad Series A isn't allowed anymore.