Updated Wednesday, May 25, 6:50 a.m. 

Due to a forecast of heavy rain, IndyGo and Allison Transmission are postponing the Release the Flex bus unveiling party previously scheduled for May 25. The event is being rescheduled to Tuesday, June 14, from 9-10:30 p.m. with a rain date of Wednesday, June 15.   

Posted Friday, May 20, 11:35 a.m.

INDIANAPOLIS – Allison Transmission and IndyGo are excited to unveil the first IndyGo bus equipped with the Allison eGen FlexTM electric hybrid propulsion system. The eGen Flex is the next generation of Allison’s proven H 40 EPTM solution, which has been operating in select IndyGo buses since 2004.

In addition to the benefits provided by the H 40 EP, such as improving fuel consumption by up to 25% versus a conventional diesel bus, the eGen Flex provides new, revolutionary capabilities.  The system, paired with the Cummins B6.7 engine in buses manufactured by GILLIG, is capable of traveling in electric-only mode for up to 10 miles or 50 minutes before converting back to diesel propulsion. The eGen Flex can operate up to 50% of the time in engine off mode. The system’s electric-only mode eliminates engine emissions and noise while loading and unloading passengers in dense pedestrian areas, in zero-emission zones and at the Julia M. Carson Transit Center.

WHAT: Join IndyGo and Allison Transmission to be the first to see and tour the bus at an exhilarating, one-of-a-kind unveiling event. Learn more about the innovative technology directly from those who helped build it. 

WHEN: Wednesday, May 25, from 9 – 10:30 p.m.  

*Please note: The rain date will be Thursday, May 26, from 9 – 10:30 p.m. 

WHERE: 1 Monument Circle 

The celebration will take place on the south circle and spoke. 

Speakers include: 

  • Inez Evans, IndyGo President and CEO 
  • Dave Graziosi, Allison Transmission Chairman and CEO 
  • Other dignitaries in attendance 

DETAILS: Enjoy a breathtaking video and light show projected on the AES building just after dark. Food and drink will be provided by Kilroy’s Bar & Grill Indianapolis. Dessert will also be provided. Members of the public are welcomed to walk up and attend. 

Please mark your calendar for one of the most exciting events of the year in Indianapolis!


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