Such a high profile service for an institution famed for technology demanded Crystal Transport embrace the environmentally friendly and innovative hybrid technology, so in 2005 they purchased a pair of DE40LF buses from New Flyer, this is 637.
The second DE40LF of the pair was 638.
The next purchase for the UMass fleet in 2007 was an articulated DE60LFR, 660, with the less box like revised frontal styling. This was followed in 2010 by this rigid DE40LFR, 661.
A second view of 661 emerging from the underpass. Two further Xcelsior XDE40 models followed, one each in 2011 and 2012 (662 & 663). However a federal report into the fleet's safety in early 2014, which restricted the company operating over state lines resulted in the University terminating their contract and most of the New Flyer fleet was disposed over, the newer models to Paul Revere Transportation, one of the two companies that UMass contracted to continue operations. Crystal continues as a private charter company in the city having rebuilt its reputation.