I have to say the longest stretch of road I’ve ridden on car or motorcycle has to be I-10 going through Texas. It seems it goes on forever. I can see why a lot of travelers prefer taking the I-40 route as it is much more scenic and the there are plenty of towns that are geared more towards the “tourist” and sight seeing.
There are major cities along the way and that means Harley Davidson dealerships. Needless to say we’ve visited a bunch of them across this great country.