It's all about the 'clocks' when driving. Lots of regulations. A 34hr reset is basically me parking the truck and being off duty for 34 consecutive hours. When a driver does this, it gives them a new set of clocks, or new work week, how ever you'd like to think of it. Here's a pic of my available clocks after this current reset.....
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That 70hr clock in the bottom line is my available hours for the week. The 14hr clock is the amount of time I can be on duty for the current day. The 11hr driving clock is how many hours I can drive for the current day. The 8hr clock is how many hours I can be on duty before taking a break. Confusing, I know. And if you think that's confusing, all of these clocks are different when I drive in Canada. Different countries, different rules.