 nostrand avenue is a local station on the irt eastern parkway line of the new york city subway. located at the intersection of nostrand avenue and eastern parkway in crown heights, brooklyn, it is served by the 3 train at all times except late nights, when the 4 train takes over service. there is also occasional 2 train service here during rush hours. this underground station, opened on august 23, 1920, has two levels. the upper level serves new lots avenue-bound trains while the lower level serves manhattan-bound trains. from north to south, each level has an express track (used by the 4 train during daytime hours and occasional rush hour 5 trains), a local track, and one side platform. both platforms have their original dual contracts-era irt trim line and name tablets. the trim line has a tan-yellow center, brown border, and a spec of blue in-between. "n" tablets on a blue background and brown border run along the trim line at regular intervals. the name tablets read "nostrand ave." in times new roman font in gold lettering on a blue and brown background, a gold center, and brown border. the platforms were extended at either ends in the 1950s to accommodate the current standard irt train length of 510 feet. here, they have signs reading "nostrand ave" in white sans serif lettering on a brown border. the center of the platforms have green i-beam columns at regular intervals with alternating ones having the standard black 
Crown_Heights,_Brooklyn IRT_Eastern_Parkway_Line_stations New_York_City_Subway_stations_in_Brooklyn Railway_stations_opened_in_1920