Looks like you are fairly new here -
And it looks like you pulled your quote from US83.com -
Which is, basically, a tourist promotional for communities along US 83.
US 83 is just a number -
If you are heading north to south or south to north in the Great Plains -
There are far, far better route options.
In fact, US 83 is one of the WORST choices if you are doing such a tour.
Why?
US 83 has far more traffic - and more through truck traffic - than nearby roads.
Although US 83 often has shoulders - where it doesn't is really dicey.
Take Nebraska, for example -
From North Platte to Valentine you can take US 83 or you can ride Hwy 97.
US 83 has 10X more traffic - Hwy 97 is practically empty.
Both route traverse the Sandhills region -
But on Hwy 97 you can be transported to another world.
On US 83, it's nice, but you have the steady whirr of traffic.
Nebraska Traffic Count Map -
http://www.transportation.nebraska.gov/maps/Statewide%20Traffic%20Flow%20Maps/2012-Statewide-Traffic-Flow-Map.pdfNebraska Bicycling Map -
http://www.transportation.nebraska.gov/docs/bicycle-guide-current-2.pdfPS - Winds and heat are a big factor in the Great Plains.
In the mid Plains winds are almost always either southerly or northerly.
Southerly winds prevail in the summer - alternating spring and fall.
Biking against a 25mph headwind is brutal and nearly impossible.
In mid-summer - temperatures above 100F are not unusual - even in the Dakotas.
Shade is rare, water is dear, and towns are far apart.