Damn man, you're gonna make me more educated. I just googled it too, and yeah that's probably what allows for the sharing. I just know the sharing exists at this point. Like if you lose your license in any state and try to just move and get a license elsewhere (using your actual real identity I suppose...) it's not gonna happen. The system I worked in quite literally just had like capital red letters with an error and just says STOP and all we could do was print out the reason which was usually like "call X state DOT for more information" with a phone number. That was one of the things I couldn't "fix" even if I wanted. Like a lot of shit I could, in theory, just fuck around with. I could make people a fully qualified class A CDL in the system (violating probably enough laws to go to prison for 20 years at the same time of course), but I had zero access to that interstate system beyond reading it. I assume police had access and probably each state has DOT liaisons of some sort that offer communication to drivers on what the issue is (usually unpaid tickets). That was off in a different department from mine though. I was more in the, uh, getting yelled at everyday by a person fresh out of jail who still had a suspended license department... you could say. Most of the people were pretty normal about things, but one lady did kinda imply she was gonna beat my ass and my insistence that doing so wouldn't help her get her license back didn't help... that job was everything from sad, to depressing, to enraging, and sometimes felt rewarding, but it was pretty crazy every day going in and working with the public like that. Usually the people who were getting fucked over somehow too. Really just left me disillusioned in the end seeing people that just wanted to get on with their lives being stomped down by this system that I was part of. I got the fuck out as soon as I could. That shit will absolutely turn you into a jaded person sending emails instructing others to not send emails if you work there too long...