Paper Highways; US Route 280 and US Route 380 in Arizona

In this edition of Paper Highways we examine US Route 280 and US Route 380 within Arizona. Both US 280 and US 380 were planned highways in Arizona that were ultimately consolidated into what became the southern leg of US Route 89.

The History of US Route 280 and US Route 380 in Arizona

In the early drafts of the US Route System in Arizona US Route 89 didn't extend south of Flagstaff. US 280 was planned to be aligned from US 60 (which became US 66) from Ashfork south to US 80 in Phoenix. US 380 was planned be aligned from US 80 in Tucson south to the Mexican Border in Nogales. US 280 and US 380 both appear on the 1925 Bureau of Public Roads draft of the US Route System along with US 89 terminating at US 60 in Flagstaff. A copy of the 1925 Bureau of Public Roads plan of the US Route System can be found here:

Report of Joint Board of Interstate Highways; October 30th 1925

US 280 and US 380 appear to have survived to the final stages of the stages of what became the US Route System or may have even been part of it. To that end there is no known copy of the final US Routes which were approved in November 1926. US 280 and US 380 make an appearance on the 1927 Rand McNally Highway Map of Arizona.

Interestingly the Arizona State Route System was initially based off giving sequential numbers to the State Highways that matched the original US Route System. In the first draft of the Arizona State Highway System the Apache Trail was planned as AZ 66 but was changed to AZ 88 when US 60 became US 66. Curiously though one of the original planned State Highways was AZ 89 which originated in Prescott and tracked northeast to Jerome. AZ 89 terminated in Jerome but was planned to reach Flagstaff. At the time the route from Prescott to Jerome was a well established highway which was well traveled due to the massive mining interests in Jerome. It would seem that Arizona had it's eyes set on extending US 89 to Prescott whenever a quality road from Jerome to Flagstaff could be built. AZ 89 can be also be seen on the 1927 Rand McNally Highway Map of Arizona/New Mexico.

It appears that the State of Arizona was able to convince the AASHO early in the early days of the US Route System that US 89 was a far more important route designation than US 280 and US 380. US 89 appears aligned all the way south to the Mexican Border in Nogales on the 1927 National Map Company Regional Highway Map.

It appears that US 280 and US 380 were never field signed in Arizona. AZ 89 was quickly re-designated as AZ 79 and was built to State Highway standards all the way to Flagstaff by 1938. AZ 79 eventually would become US 89A in 1941 which fulfilled the push to get a US Route to Prescott by way of the mines of Jerome. US 280 was ultimately recycled in 1931 into a new highway between Savannah, GA and Columbus, GA. US 380 was recycled in 1932 as a new highway San Antonio, NM and Albany, TX.

Did Caltrans just kill the G26 cutout US Route shields?

The US Route System was formally created by the American Association of State Highway Officials during November 1926. Through the history of the system the only state to which has elected to maintain cutout US Route shields has been California. The G26 series cutout US Route shields have become a favorite in the road enthusiast hobby and are generally considered to be much more visually pleasing than the standard Federal Highway Administration variant. However, the G26 shield series appears to have been killed off on January 18, 2026, when Caltrans updated their Manual of Uniform Traffic Control Devices. This blog will examine the history of the US Route shield specifications in California and what is happening with the 2026 changes. The blog cover photo is facing towards the terminus of California State Route 136 and at a G26-2 specification US Route 395 shield. In the background Mount Whitney can be seen in the Sierra Nevada range. ...

Three Points Road (Los Angeles County)

Three Points Road is a rural cutoff route which connects Pine Canyon Road (Los Angeles County Route N2) and California State Route 138 near Neenach of Antelope Valley. Originally the community of Three Points (named for the junction Pine Canyon, Oakdale Canyon and Oakgrove Canyon) was served by 265th Avenue West. The modern three-mile-long corridor of Three Points Road was developed by 1950 to serve as a softer transition to California State Route 138. Part 1; the history of Three Points Road Three Points Road is named in reference to the community near the extinct Neenach Volcano known as Three Points. Three Points itself is a reference to three canyons it sits in the middle of: Pine Canyon, Oakgrove Canyon and Oakdale Canyon. Three Points was homesteaded by the Laffery family in 1892. Nearby Gookins Lake was named after one of the Laffery family members. Three Points (blue pin) can be seen at the intersection of Pine Canyon Road (now Los...

Hawaii Route 50

Hawaii Route 50 is the longest Sign Route on the island of Kauai at 32.6 miles. The entirety of Hawaii Route 50 is overlaid atop Kaumualii Highway from Lihue west to the Pacific Missile Range Facility at Barking Sands. Hawaii Route 50 is one of the original 1955-era State Highway designations on Kauai. Much of the Kaumualii Highway corridor was constructed during the sugar plantation boom of the late Hawaiian Kingdom. The first tee beam bridge in Hawaii would be constructed along the Kaumualii Highway in 1911 at the Hanapepe. Much of this highway would be modernized to two-lane standards through the 1930s and 1940s. This page is part of the Gribblenation Hawaii Roads series. A compellation of all Hawaii-related media from both Gribblenation and RoadwayWiz can be found by clicking here . Part 1; the history of Hawaii Route 50 and Kaumualii Highway Hawaii Route 50 is the longest highway on Kauai at 32.6 miles. The highway begins at Rice Str...

James Cowlin said…

Thank you for the information about the history of US Route 89 in Arizona. I am aware of some of the history but not in the detail you provided. I have been working on a project to promote travel on US 89 for about 15 years. I wrote an article on what I learned about the history of 89 between Canada and Mexico for my website. Have you researched any of the other sections of the highway? The website is usroute89.com

Jim Cowlin

7:21 PM

Challenger Tom said…

We do have quite a bit on US 89 in Arizona. Off the top of my head some of the articles on US 89 that we have feature; the Navajo Bridge/US 89A, the 1911 Cameron Suspension Bridge, former US 66/89 in Williams, former US 89 on AZ 89, and former US 89A on AZ 89A.

8:14 PM