Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla The Fairmount Line yana fuskantar babban gyare-gyare wanda ya hada da gina sababbin tashoshin hudu a Boston; na farko daga cikin wadannan, Talbot Ave, ya bude a watan Nuwambar 2012.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Layin Fairmount yana fuskantar babban gyare-gyare wanda ya haɗa da gina sabbin tashoshi guda huɗu a Boston, yayin da aka fara aiki a kan sabon ƙarshen yammacin Fitchburg Line a tashar Wachusett. "