NEW YORK – MTA New York City Transit has received 125 diesel-electric series hybrid buses from Orion Bus Industries, a division of DiamlerChrysler, according to Green Car Congress. The bus company has also begun delivering the next set of 200 buses. At the end of 2005, MTA's fleet of 4,215 vehicles will have 325 hybrid buses. This constitutes the world's largest hybrid bus fleet. The city began testing a pilot fleet of 10 Orion VI hybrids in 1998. In a separate incident, the Roosevelt Island Operating Corp. of the State of New York has also put in an order to Orion. The corporation has ordered four Orion VII hybrid buses for use in its transit bus fleet.