The KHS account got a question on Twitter about the date of this photo and I thought I would crowd-source and answer. Any ideas? It might help to know when Broadway and the subway station were widened at 242nd Street.
“Survey photograph looking south at the 242nd Street Station on the IRT West Side / Seventh Avenue Line, two months after the opening of the station. The photograph shows a carnival, including a ferris wheel and carousel, being either put up or taken down.”