Jay St-MetroTech (A,C,F)

Jay Street-MetroTech is the new name of the renovated Jay Street-Borough Hall Station. The station was officially renamed on December 10, 2010 after a $164.5 million project that included building a new transfer corridor to the R train at Lawrence Street. The station has four tracks, the outside ones for the A,C and lead to Fulton Street, the inside ones for the F leading to the Culver Line. North of the station are crossovers between the tracks so trains from the Culver Line can reach the Cranberry Street tubes and 8th Avenue subway, and vise-versa for Fulton Street trains reaching the Rutgers Street tubes. These are often used both for planned reroutes and unplanned emergencies when a train is disabled in one set of tubes or the other. As part of the renovations the platforms have been retiled with a wider blue trim-line and a narrow band of a turquoise blue before the narrow black trim-line. The tops of the tiled columns that line the Brooklyn-bound platforms have a similar trimline, the regular painted beams are still blue.

The renovation of the station chopped the public areas of the mezzanine into two. The new configuration is a small mezzanine at the northern end of the platforms with two staircases up from each platform that lead out to a bank of both unstaffed turnstiles and High Entrance/Exit Turnstiles. This leads to an exit with two escalators on each side of a central staircase inside the North Portico of former NYC Transit Building that was leased in 2012 to become a building for NYU Tandon School of Engineering/Polytechnic Institute. As part of the renovations to the former Transit buliding, this entrance was reconfigurted to have just an up escalator and a wide staircase with glass walls. The Art Deco-style subway signs were maintained.

On this mezzanine, there is also a wide staircase that is accessed via a passageway to a wide street stair on the west side of Jay Street inside MetroTech Plaza that is the pedestrian street Myrtle Avenue has become. The terminus of the Myrtle Avenue elevated was here from 1944 until it became the last real elevated line in Brooklyn to close in 1969 named Bridge Street-Jay Street. After service was discontinued over the Manhattan Bridge a free transfer ticket could be obtained when boarding at intermediate stops on the Myrtle Avenue elevated or at Broadway-Nassau Street to allow Myrtle Avenue elevated customers rides to downtown Manhattan without paying an additional fare.

The mezzanine starts again half-way down the platform with a staircase down to each platform. Next along the east wall is a pair of High Exit Turnstiles and two exit only turnstiles that lead out to a small fare control area to two street stairs at the NE corner of Jay and Willoughby Streets. This is followed by the elevator down to the Manhattan-bound platform, opposite this small entrance area is the elevator to the Brooklyn-bound platform. Almost immediately on the west side of the mezzanine is the 24-hour booth and bank of turnstiles that lead to a street elevator, in a conventional shaft at the NW corner of Jay and Willoughby Streets and a short corridor leading to an exit with up/down escalators with a staircase in between them inside the South Portico at the southern corner of the former MTA/now leased to NYU building. As part of the renovations to the former Transit buliding, this entrance was reconfigurted to have just an up escalator and a wide staircase with glass walls. The Art Deco-style subway signs were maintained.

Across from this entrance is the new transfer to the R train at its now renamed Lawrence Street Station. The corridor consists of a down escalator that begins almost on the IND station mezzanine and leads directly to that station's island platform. This is followed by an elevator to R platform. A staircase is also available that makes its way down via an intermediate landing (to get aligned on the platform) with the transfer passageway ending with an up escalator that comes straight up from the R train platform. The passageway is very short. The distance to walk from the IND mezzanine is almost is non-existent that it’s amazing a transfer hadn't been built before. The entrances here are rightfully now signed for the R as well, since there an equally convenient way to reach that platform compared to the station's still open original entrances. Next are two staircases down to the Manhattan-bound platform and just one additional staircase down to the Brooklyn-bound platform.

The mezzanine continues open to the platform below over the southern half of the station where the station's artwork is installed with a curved railing providing some views to the Manhattan-bound platform now left open with views down below. The mezzanine reaches the southern entrance near at southern end of the platforms below. Here a single staircase leads up from each platform to a full mezzanine-width fare control area with High Exit Turnstiles that lead out to streetstairs the NE and NW corners of Jay Street (which becomes Smith Street after this intersection) and Fulton Street.

The station has a long closed entrance that once had streetstairs near the SW and SE corners of Smith Street and Fulton Street. These staircases led to a very small south mezzanine where a staircase led down to separate passageways at platform level that passed underneath the 4 IRT Brooklyn Subway tracks running under Fulton Street above before ending at the southern end of each platform.
1-20: December 28, 2010; 21-23: June 18, 2011; 24-27: September 26, 2012; 28-34: May 19, 2012; 35-38: June 18, 2013; 39-57: September 25, 2023;