I have to admit, part of me also wanted that simple answer. My tiny roadtrip from San Diego to LA and back felt like a long-ass drive. And in that six hours, I got cut off by an asshole in a BMW thrice. But it's not like the rest of the world are saints: the Dutch are known to drive selfishly, rarely making room when you want to merge for example. Germans are nicer but are worse at tailgaiting. What I did find worrisome was that driving in the U.S. and Canada was way easier (in terms of mental energy needed) than I expected. I did not feel like I needed to pay attention as much as I do over here, like once I'm on the right avenue I just have to follow the guy in front of me and not run a red light, even in dense urban areas. It was tempting to check my phone because driving was legitimately more boring than I was used to. My impression is that distracted driving is a much bigger issue over there than here.