 In January 1927 , Turner submitted a revised proposal . It was now going to connect to a Tenth Avenue trunk line as well as to crosstown lines in the Bronx and Queens . The Second Avenue Subway was still a six @-@ track line through Manhattan , except for a short eight @-@ track tunnel at its junction with the Queens lines . The plan called for a connection to the IND Concourse Line in the Bronx , as well as another one to the IND Fulton Street Line in Brooklyn . Such a plan would have cost $ 165 @,@ 000 @,@ 000 ( equivalent to $ 2 @,@ 248 @,@ 000 @,@ 000 in 2015 ) , including connections and underwater crossings . As the IRT Lexington Avenue Line got more crowded , some suggested ideas that were considered unusual . One suggestion included a new tunnel under Lexington Avenue , while another included a tunnel under a separate right @-@ of @-@ way between Second and Third Avenue . 
