Since the Systems Analysis (1991) and the opening of the original line (1993), two additional MetroLink corridors have moved through construction—St. Clair County (2001) and Cross County
(2006). Despite the lack of construction on the other MetroLink corridors, planning efforts have progressed for multiple corridors. The table below summarizes the current status of
planning and implementation activities at which each MetroLink corridor presently stands.
TABLE: MetroLink Corridors – Status of Planning and Implementation
Many of the acronyms shared in the table, like MTIA, AA/DEIS, or PE, represent terms better defined, along with other terms, in our glossary called Talking the Talk.
East-West Gateway's Transportation Corridor Improvement Group (TCIG) manages transportation studies, including MetroLink system planning. The TCIG follows a strategic process of assessing
needs, evaluating potential strategies, and designing and analyzing alternatives. The process of how a project evolves from systems analysis to refinement of alternatives to actual
implementation is shared in greater detail on our Corridor Planning web page.
The regional map below shows all MetroLink corridors considered in planning studies, as well as those lines in operation or under construction. Shaded areas represent
corridors that have not yet been studied to the level of an MTIA or Alternatives Analysis or, in the case of St. Charles, have not been deferred due to lack of local support. Dashed lines
represent other conceptual alignments. In the case of Metro South, two final alternatives resulting from the its recent AA/DEIS are shown. Metro South, Northside, Southside and Madison/Northeast are those corridors having undergone the most recent planning. For more information on each segment, click any section of the interactive map below.