Several posted about US 36 across Kansas being a good scenic route. I could have missed something but on Google maps it looked like US 36 begins in Ohio just east of I-77 (south of Canton) and mostly went all the way to Denver, Colorado. West of Denver, today's maps show only I-70 (could have originally been 36) going onto toward California. There were some places where it joins with other highways. US hwy 50 is another one of those older roads that has a lot of yesterday's countryside, just watch out for Barney Phife. This coming winter, wife and I want to drive old US hwy 54 from Illinois to New Mexico like we did when the interstate system was in its infancy in the 60's.