[2] The A branch was closed on June 21, 1969, and replaced with the route 57 bus, though the trackage was retained for non-revenue moves to Watertown Yard.

[3] The line was finally abandoned in 1994; a several-hundred-foot stub track was left until the mid-2000s to temporarily store disabled trains.

Packards Corner was not made accessible during the initial 2001–03 round of Green Line station renovations.

[7] A design shown in March 2024 called for the platforms to be rebuilt at their current locations, with a new track crossing and crosswalk to the west sidewalk at the south end of the station.

[8] In May 2024, the Federal Transit Administration awarded the MBTA $67 million to construct accessible platforms at 14 B and C branch stops including Packards Corner.