"NX" or "Entrance-Exit" system. In this system, the tower utilizes a wide, tall electric light signal board which features a diagram of the nearby stations and track layout. It operates on direct current and consists of simple knobs and push buttons to control track switches, as opposed to the previous system which ran on alternating current and required a complicated series of levers. Exits Stairways are present from each platform to the mezzanine above the tracks. Fare control is located in the mezzanine. Outside fare control is a street elevator leading to the northeast corner of Pitkin and Euclid Avenues. Street stairs also lead to all four corners of the intersection. The bus routes stop outside the station. East of the station The next station east (railroad south) for IND Fulton Street service is Grant Avenue, located in City Line, Brooklyn. However, an unfinished station is rumored to exist at 76th Street in nearby Ozone Park, Queens, just four blocks east of Grant Avenue. The track work near Euclid Avenue is intricate, allowing trains to enter the Pitkin Yard from both the express and local tracks (where C trains relay to get from the southbound to the northbound local track), and with connections to the two-track Grant Avenue station from both the express and local tracks; the Grant Avenue spur then veers northeast towards Liberty Avenue. All four mainline tracks continue below the Grant Avenue connection, used only to store trains, east under Pitkin Avenue until approximately Eldert Lane (just south of the Grant Avenue station). It was planned that these tracks would continue under Pitkin Avenue to Cross Bay Boulevard, as part of a never-built system expansion which would have extended the Fulton Street Subway to the Rockaways and to Cambria Heights near the Queens-Nassau County border. On the electric light signal board in the control room at Euclid Avenue, there is a taped-over section of the board that hides the 76th Street station. There are also two tracks coming from the Pitkin Yard heading towards the planned 76th Street station site. These tracks would have merged with the mainline tracks just before 76th Street station. When Pitkin Yard originally opened, the yard leads toward 76th Street were usable to relay short trains on. Today, those two tracks are no longer connected via switches. Parts of the trackways still exist, but the switches were removed and the tunnel ends