I found a picture of the enviro500 for your viewing.

https://www.alexander-dennis.com/alexander-dennis-appoints-big-rig-manufacturing-as-double-deck-build-partner-for-north-america/

Alexander Dennis, a subsidiary of NFI Group Inc., one of the world’s leading independent global bus manufacturers, today announced that it has appointed Big Rig Manufacturing as contract manufacturing partner to meet resurging interest in the Enviro500 double decker in North America.

“This next step in evolution is particularly exciting, as it will allow Big Rig Manufacturing to bring cutting-edge safety features and newly pioneered zero-emission technologies to life, supporting Alexander Dennis in fulfilling their surging customer demand.”