The CenterLine was a proposed 9.3-mile (15 km) light rail system serving Irvine, Costa Mesa and Santa Ana.
It was originally planned in the 1990s and was intended to open in 2009.
Costing $1 billion, it was originally envisioned as a 30-mile (48 km) route that would run from Fullerton to Irvine, through Anaheim, Orange, Santa Ana and Costa Mesa.
The route would have served destinations including John Wayne Airport, South Coast Metro, South Coast Plaza, Santa Ana College and downtown Santa Ana.

While OCTA secured funding through Measure M, lack of support from Orange County's congressional representatives resulted in no federal funds obtained for the proposed transit line.
In February 2005, the CenterLine was suspended indefinitely, and in May 2005, the plan was officially scrapped in favor of expanding express bus service throughout Orange County and improving existing Metrolink commuter rail service.
The CenterLine was a proposed 9.3-mile (15 km) light rail system serving Irvine, Costa Mesa and Santa Ana. It was originally planned in the 1990s and was intended to open in 2009. Costing $1 billion, it was originally envisioned as a 30-mile (48 km) route that would run from Fullerton to Irvine, through Anaheim, Orange, Santa Ana and Costa Mesa. The route would have served destinations including John Wayne Airport, South Coast Metro, South Coast Plaza, Santa Ana College and downtown Santa Ana.
While OCTA secured funding through Measure M, lack of support from Orange County's congressional representatives resulted in no federal funds obtained for the proposed transit line. In February 2005, the CenterLine was suspended indefinitely, and in May 2005, the plan was officially scrapped in favor of expanding express bus service throughout Orange County and improving existing Metrolink commuter rail service.
Orange County Transportation Authority