According to the US Department of Energy (DOE), 34 hydrogen fuel cell buses are already running in various states including California, Massachusetts, Michigan, and Ohio. An additional 37 fuel cell buses are planned to be on the roads soon.

Graphic shows US states with current and planned fuel cell buses. Illinois: 2 buses planned; Michigan: 2 buses current; Massachusetts: 1 bus current; Ohio: 6 buses current, 6 buses planned; California: 25 buses current, 29 buses planned.