Category: US 191

The longest three-digit US routes

7/5/2020

(Last updated 2/28/2023)
Of the "main" US highways (i.e. the one- and two-digit routes), the longest nine were all east-west routes (6, 20, 50, 30, 40, 60, 70, 80, 12). And if we take the longest 16 highways, only one of them is a north-south route (US 1, shown in red here):

That stands to reason, because the United States is roughly twice as wide from east to west as it is from north to south. So it makes sense that there would be more long east-west routes.

But does the same hold true if we look at the "branch" routes of the system (i.e. the three-digit routes)?

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US route wannabes, 1971-72 edition (UT-WY)

12/21/2019

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US 163 was commissioned by AASHO* at their June 1970 meeting. The designation ran from Kayenta AZ on the south up to Crescent Junction UT on the north (illustrated by the green lines on this map):

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Why and how the Four Corners area US routes should be renumbered (again)

2/22/2017

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It is always instructive to begin by looking at the history of highways in the area, in order to understand how and why the current situation came to be.

The early years
To this day, vast tracts of land in northern Arizona and southern Utah are miles away from any kind of paved road. But the remoteness of this area was even more pronounced back in the late 1920s, when the US routes were first commissioned. At the time, there was no road worth showing on maps between Green River and Salina UT (along today's I-70 corridor). Nor between Cortez CO and Tuba City AZ (the path of modern US 160). Nor to the south from Monticello UT (along today's US 191):

c. 1927, Rand McNally

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US Highways Blog

The longest three-digit US routes

US route wannabes, 1971-72 edition (UT-WY)

Why and how the Four Corners area US routes should be renumbered (again)

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