I'm not an expert in the trucking industry, but I'll attempt anything. If you're looking under NAFTA, I know there are provisions in NAFTA right now that allow for cross-border trucking between Mexico and the United States. From what I understand, that provision has never been implemented when it comes to trucking in the United States, because the teamsters have had them tied up in courts since NAFTA was actually negotiated. Again, I'm not an expert on trucking.
Let me put it in terms of airlines, which I'm not an expert in either. A Canadian aircraft goes from Toronto to Berlin. Is it considered cabotage?