very asymmetric (1:9), excluding effective usage of the first one (MG-A). It's the boundary between both continuously variable ranges. The two-modes switching occurs at this point, when the third planetary gearset ring gear reach zero rotational speed, and all the planetary gearset carriers gears reach the same rotational speed together. Third Fixed Gear ratio: (clutches C2+C4 engaged, C1+C3 released) The first planetary gearset pair are in a synchronous 1:1 fixed gear ratio by C4 clutch action, and, by the way, both motor-generators are mutually synchronous, either all as motor, or all as generator. It's the midpoint of the second continuously variable range, when both motor-generators rotational speed join. Fourth Fixed Gear ratio: (clutches C2+C3 engaged, C1+C4 released) The third C3 clutch block the first planetary gearset sun gear, and the second motor-generator (MG-B) still off-line. Applications Buses The system was first used in the New Flyer transit buses deployed in 2001. City bus system by Allison Transmission King County, Washington King County Metro (361 New Flyer buses announced from 2002 to present) The first DE60LF, serial 24129 Albuquerque, New Mexico ABQ RIDE (112 New Flyer buses announced from December 21, 2004 to present) Indianapolis, Indiana IndyGo (two buses announced January 24, 2005) Yosemite National Park National Park Service (18 Gillig buses announced April 25, 2005) Kelowna and Victoria, British Columbia (6 New Flyer buses announced May 5, 2005) Shreveport, Louisiana SporTran (one bus announced June 9, 2005) Charlotte, North Carolina Charlotte Area Transit System (2 buses announced June 9, 2005) Springfield, Massachusetts Pioneer Valley Transit Authority (one bus announced October 14, 2005) Aspen, Colorado Roaring Fork Transportation Authority (seven buses announced December 9, 2005) Consortium (led by San Joaquin RTD) of 10 transit agencies in California and Nevada (157 Gillig buses announced March 20, 2006). Note: ABQ RIDE of Albuquerque, New Mexico was formerly a member of this consortium, but instead chose to order New Flyer buses on their own instead. Madison, Wisconsin Madison Metro (5 Gillig buses announced September 11, 2007, with 10 more planned for purchase in the next few years) RWD/4WD Truck/SUV The longitudinal system for light trucks from General Motors will be manufactured at Baltimore Transmission by GM's PowerTrain division. The nickel-metal hydride batteries will be manufactured by Panasonic EV of Japan. The system was introduced for the 2008 model year in the full-sized Chevrolet Tahoe and GMC Yukon SUVs as a specific 2-Mode Hybrid model.