I wish more people would respond to this comment rather than debate the benefits of putting solar on a ferry. Is there data on the avg commute distance in different cities? 50km seems like a significant distance and could cover a large number of commuters.
I used to do 80miles (128km) a day with harsh traffic and that was 1.5 hours each way(40miles). so yes you are right it's much closer to 2hrs than 1hr.