The following are events related to rail transportation in the United States that happened in 2015. January January 6 – Groundbreaking of the California High-Speed Rail system, indicating sustained construction activity. February February 21 - Central Station opens on the Houston METRORail Red Line April April 5 – Reopening of Tri-Rail's Miami Intermodal Center in Miami. May May 23 - The Purple and Green lines of the Houston Metro Rail system opens with 13 new stops. August August 22 – Phoenix Valley Metro Rail extends from Sycamore/Main Street to Mesa Drive/Main Street via the Central Mesa Extension. September September 12 – Opening of the MAX Orange Line in Portland, Oregon, United States. September 13 – New York City Subway 34th Street–Hudson Yards opens to public, after a series of delays. References