A three-step screening process was used to define a Locally Preferred Alternative for the Red Line.

Conceptual Screening: Market and traffic analysis will guide decisions regarding vehicle type, route, preliminary stations, and terminals.

Detailed Screening: Ridership and cost estimates will guide the refinement of station locations and potential operating plans.

Final Screening: A specially developed cost model will be used to balance system details, such as vehicles, station designs, and service schedules,with anticipated funding program and local resources