Five miles out of Boston's South Station, Amtrak train 175, the Patriot to Washington, speeds along what was then the newly opened Southwest Corridor depressed right-of-way through Roxbury and Jamaica Plain behind an F40PH. The four-mile-long cut that has carried corridor trains since 1987 replaced a combination of a surface right-of-way and an embankment, both four tracks wide, that had carried the railroad for generations but was regarded by some community groups as a neighborhood divider and eyesore. The Forest Hills transit/commuter rail station is in the background.