[fennecfoxen]

> As far as I know big trucks have meters that monitor how long you have been driving (at what speed).

Most freight companies have an existence and operations outside the grey market. They can be subjected to this sort of regulation. An independent guy with a van? Enforcing that will be a whole lot harder. He won't install it. Or he'll install it and disable it, or otherwise thwart its well-functioning. If you set up checkpoints to verify that the device is installed and functioning he'll detour around them, over rural highways.

And if the lawless independent guys with a van can undercut the lawful one, they'll get the business.