(as it was doing with the preceding Orion V fleet), TTC opted to retire the buses. Several Orion VI buses caught fire (WMATA, 2012; LACMTA, 2018) resulting in the idling of the entire Orion VI fleet for those transit agencies. The United States National Highway Traffic Safety Administration also received separate complaints of tires catching fire in Arlington Heights, Illinois (2004) and Birmingham, Alabama (2005). In addition, a loose hydraulic pump fitting resulted in an engine fire for WMATA in 2010. As of , one of its Orion VI models still operates for Copper Mountain Transportation in Summit County, Colorado with the three door configuration. Sault Ste. Marie Transit Services was the final Canadian operator of the Orion VI, operating former 1999-built OC Transpo units that were acquired in 2013, with retirement occurring in mid-to-late 2021. Competition Gillig Low Floor NABI LFW New Flyer Low Floor Nova Bus LF Series References External links Buses of Canada Buses of the United States Vehicles introduced in 1995