I once drove coast to coast. Started in San Diego California, drove a couple hours on I-15 up to Barstow to meet I-40, and then passed this sign:

Two and a half days later we pulled into Raleigh. I slept through most of New Mexico and all of Arkansas, I was at the wheel through Arizona, half of Texas (we switched at Amarillo), and some of Tennessee into North Carolina, my cousin was at the wheel otherwise. It’s the farthest single trip I’ve done by land.