Service History
On November 8, 2004, the Chicago Transit Board approved the purchase of 20 model DE40LF diesel-electric hybrid buses from New Flyer of America, Inc. The order was split amongst two hybrid technologies: GM/Allison parallel hybrids (to be numbered the 800-series) and ISE-Siemens ThunderVolt series hybrids (to be numbered the 900-series).
With the exception of a roof-mounted battery pack, the buses are aesthetically identical to CTA’s 1000-series D40LF diesel buses.
Delivery of the ISE-Siemens ThunderVolt series hybrid models began in August 2007.
As of Winter 2014⁄2015, all ten buses have been retired.
