I would like to suggest a different route which avoids Denver and is not so much a route that has Interstate driving. But it will take a little more time.
Take I-45 north to the Waxahachie exit which is Highway 287.
Follow 287 northwest through Fort Worth (or go around FW depending on the time of day).
Stay on north 287 in Colorado.
Near Limon take highway 71 north to Brush
In Brush switch over to Highway 34 through Greeley.
Then get on I-25 to I-90 and then on to Livingston.
You could also follow the first part of this route to Vernon, Texas. Then take 283 all the way up to Nebraska and then take Interstate 80.
I enjoy the US and state highways.
These routes are pretty flat except in Montana and you will avoid the traffic and tolls near Denver.
Marilyn w/ Joe, 2016 Class C Sunseeker 2430 SF, often pulling a Ranger bass boat. Traveling with Trigger
Smudge & Gizmo are waiting at the Rainbow Bridge