Heres part two of a daily double as the R68 D trains deliver a double screechin symphony as they enter and exit the 4th Avenue corridor via the West End Line .brHeres a double screechin symphony as the Coney Island-bound R160B Siemens N train hauls ass around this 90 degree turn and the Bronx-bound R68 D .brDue to midday construction, all Manhattan-bound N trains operated via the D line in Brooklyn between Coney lsland and 36th Street during the midday .brHeres part one of a crazy Daily Double screechin symphony as two R68 D trains do a 90 degree curve into and out of the 4th Avenue Portal.