The Chameleon of American City Buses

The Gillig Low Floor bus has been a staple of American transit since 1997, yet it is secretly a shapeshifter. This single model can be powered by everything from traditional diesel to hydrogen fuel cells.

While these buses all look nearly identical on the outside, what hides beneath the floorboards varies wildly depending on the city’s needs. Engineers designed the frame to be modular, allowing the same chassis to house clean electric batteries or complex hydrogen technology. This flexibility has allowed public transit agencies to pivot toward green energy without having to completely overhaul their entire fleet design. It is a masterclass in durable, long-term engineering.