The city plans to close a one-block stretch of DeKalb Avenue in order to nearly triple the Albee Square Pedestrian Plaza in Downtown Brooklyn, at the triangular intersection of Fulton Mall, DeKalb Avenue and Bond Street. The city’s $12.5 million design for the park will include public seating, bicycle racks, lighting and trees, and the city hopes to start construction this winter and finish by 2011. The area will soon be part of a revived residential and commercial district, that includes a Target store and City Point, a 65-story residential and retail tower that will be the tallest building in the borough.