Although submerged west of the Loop, the Kennedy Expressway is a physical barrier between the east and west, the former primarily office space and the latter mostly residential. Bridges link the two sides physically, but the neighborhoods lack the continuity of other parts of the city. Johnson's project looks at the possibilities that might arise for both office and residential development if an approximately 1.5 mile length of the expressway were covered with parkland. Spurred in part by Perkins and Will's recent completion of the Skybridge residential high rise adjacent to the Kenndedy, Johnson expanded part of the Central Area Plan which proposed covering a much smaller portion of the expressway. Kennedy Expressway Green Corridor.Chicago, Illinois