I’ve heard of Roadmaster but don’t know anything else about them.
As for Hours of Service, driving is limited to 11 hours, and all driving must stop once 14 hours have passed since first on-duty or driving has started. However, there is no limitation of only working 14 hours. Theoretically, you could be asked to work unlimited hours, you just can’t drive until you get 10 hours off/sleeper. Legally, the boss could require you to do work, not driving, all 168 hours in a week.
Other than e-logs, there haven’t been many changes to HOS since 2014. There are HOS differences between passenger-carrying vehicles and freight-carrying vehicles. But I don’t remember what those are, I’ve never hauled “self-loading freight”.