Front Range Express (FREX)

Front Range Express (FREX - stylized frex) was a commuter bus service that began in 2004 and operating between the cities of Colorado Springs and Denver, with stops along the way in Greenwood Village, Monument and Castle Rock in Colorado, USA. FREX operated on Interstate 25 except when exiting to make stops at each city. FREX served the southern portion of the Colorado Front Range and during its tenure was operated via different contracts by Veolia Transport & Laidlaw Transit. It was added as a part of Mountain Metropolitan Transit, which serves the Colorado Springs and El Paso County areas. In 2005, annual ridership was 118,389 and daily ridership was 464.

In 2007, nineteen Gillig BRT suburban buses were bought. Before 2007, FREX used many different models of buses including the GMC RTS, MCI 102-C3, MCI 102-D3, MCI 102-DL3 and NovaBus RTS WFD suburban. However, the older buses were prone to breaking down. To provide a more efficient service, standard Mountain Metropolitan Transit buses were used from December 2006 until the new Gillig BRT suburban buses entered service in mid-2007.