Thats back in the day logging figures. The industry is an evolving thing. They have tons of new technology. Regulations have changed. Modes of operations have changed. Things like weigh on the fly and Pre Pass. Paperless logs. Secure internet posting of cargo manifests. Interstate internet hook ups between scale houses. Satellite communication with the trucks. Companies know where the truck is and what it's doing and if necessary the dispatcher can shut a truck down from his computer at headquarters. Changes to the hours of service rules. Operations wise Team drivers maximized. They do a FULL 100% drop & hook. Solo drivers and Shag drivers handle the load and unload. Back under the old 10 & 8 rules with a 65 mph governed truck As a solo drives the max I could run in a "day" (24 hrs one log page) was 760+ miles. When they went to 11 & 10 I was able to start hitting 840+ miles in a day. Plus they shaved 14 hours off the reset after a 5 day flame out. I got off the road when they banned splits. Also stuff like when the truck maintenance getting done while the driver is sleeping. Back in the day a solo could log a million miles in 7 to 8 years now they do it in 4 to 5 years. Teams? Their trucks are turned up higher they are operationally treated special and they are maximized as much as possible. My best year solo I did 265,700.