Due to steep slopes, Seeley Street crosses Prospect Avenue on a masonry bridge.
It runs one way for one block between Ocean Parkway and Greenwood Avenue, with an on ramp leading to the Prospect Expressway westbound.
As originally designed, Middle Street's southern terminus was at the (then) city limits, approximately the present intersection of Terrace Place.
boulder - strewn terminal moraine, and the fact that the Brooklyn and Flatbush sections of Prospect Avenue were misaligned at the boundary between the two municipalities, delayed completion of the thoroughfare for many years.
In 1903, plans were approved to correct the misalignment at the former boundary, to cut through the hill and connect the sections of Prospect Avenue as a continuous roadway.