Indianapolis Indiana to Springfield Missouri

I drove 454 miles from Indianapolis Indiana to Springfield Missouri today. Once we left the highway and joined up with Route 66 we found navigating difficult. Surprisingly, modern maps don't always show the route of historic Route 66 clearly. The route is on the map but it is often marked with another name or number. We did stop in a cool Route 66 museum in Litchfield Indiana, but other than stopping to eat, we stuck to the major highway and bypassed Route 66. I can't manually navigate and drive at the same time. My wife gets agitated if she has to navigate so I think the attempt to drive along Route 66 ends here. The goal of this vacation is to relax and explore. I don't want my wife to get stressed out on what is her vacation too so I think we will stick to the major highways and I can better plan the route for a solo trip I'll take at a later date. 

We may still be able to see a few things on Route 66 using a turn-by-turn navigaton app I purchased today. Who knows. Hope so.