Trains are interesting because they will swap crews near the border. You won't have a Canadian crew on a train going beyond the first yard/depot in the US or vice versa. Even going that far is a touchier topic at the US/Mexico border. VIA/Amtrak changeover at the border clearance stoppage itself. But good luck convincing the trucking industry that they could do something similar.

https://www.aar.org/article/mexican-crew-interchange/