ST. LOUIS – MetroLink will look different for passengers starting Monday.

Metro Transit is launching a pilot program to put single-car trains into service instead of two-car trains. The single-car trains will operate seven days a week throughout the 46-mile system in St. Louis City, St. Louis County, and St. Clair County.

Metro says a one-train car is more efficient for security patrol and reduces the wear and tear on machinery.