Connect Blue and Red Lines and extend beyond to Lynn and Longwood

Extending "the Blue Line west to Longwood... could ease pressures on the Green and Orange Lines and improve rapid transit access to several major employers, academic institutions and healthcare providers—including to major potential developments at Suffolk Downs and Wonderland—and to Logan Airport." (Source: "Focus 40: Positioning the MBTA to meet the needs of the region in 2040" (2019), pg 41)