Red Line
From City of Heroes: Rebirth - Wiki
Overview
The Red Line was the third line of the Paragon City Monorail. The line was badly damaged in the Rikti War. Parts of it were absorbed into the other two lines, the former Yellow and Green lines. Other parts can still be seen in their damaged states in places like Boomtown. The most visible remaining sign of the Red Line is the monorail cars themselves, all of which still bear the signage of the Red Line.