They will be easily identifiable with the neat blue/green decals representing hydrogen molecules. A CTV News story said that it may be summer before the buses are in service.
This is part of a $9.8 million pilot project called the Alberta Zero Emission Hydrogen Transit (AZEHT) initiative.
There are similar buses operating in the United States – a listing of operators can be found on the Canadian Public Transit Discussion Board (CPTDB) Wiki page. The City of Edmonton states that it will be the first in Canada to run both hydrogen fuel cell electric buses and battery electric buses.
Check out ETS’s video below: