 All of the Xcelsior buses are 40' despite the fact that nine replaced 35' buses.This replacement plan also allowed CATA to make a net gain of 3 40' buses in their fleet, as only 25 buses were replaced.One of CATA's buses (Bus #85) was a hydrogen-powered bus, a part of an extensive hydrogen demonstration project that is being conducted by Penn State's Pennsylvania Transportation Institute (PTI).