From humble beginnings to great lengths
US 83 was among the inaugural routes of 1926. But at the time, and for the next couple years, it was a very short route -- only about 170 miles long -- running between the capital cities of the two Dakotas:
However, by the early 1930s the US 83 designation had been extended not only north to the Canada border, but all the way down to the Mexico border too. This increased US 83's distance to nearly 1900 miles, and made it one of the longest north-south US routes. Additionally, as a result of US 83's new role as a trunk route, three newer US routes were numbered as branches of US 83. Two of these soon became quite lengthy themselves, and they still exist (US 183 and US 283). Just as these highways intertwine with each other, their history is also interrelated. This article examines the evolution of US 83, as well as the x83 routes that are part of its "family".
(last updated 8/21/2020)
"One great red line"
For about a quarter-century, US Route 6 was the longest highway in the country (and it may still be, depending how one measures). In Jack Kerouac's novel On the Road, the main character described it as "one great red line across America". During those years it ran between Provincetown MA and Long Beach CA, and I believe there has never been a longer highway in the United States. Exactly how long was it? Well, believe it or not, the answer to that question is debatable (see this page for more details about why it is difficult to calculate).
Pretty amazing coincidence...
Heading west from Portland, US 26 enters the path of totality near Mt. Hood, and remains within the path for about 330 miles, all the way to the Idaho border: