City planners agreed. The driveable area in the intersection covers 2½ acres and includes eight corners. A typical intersection has four corners and would cost between $350,000 and $400,000 to design and construct safety improvements. Redesigning the South Philadelphia intersection is expected to start in the fall and take a year, with construction after that. Adding to the project timeline is the need for community input on the proposed design. The terms of the grant require the project to be finished in three years.