In September 2007, Metro-North reached an agreement with the New York City Department of Transportation (NYCDOT) to install pedestrian traffic signals along Park Avenue between 46th Street and 56th Street. The two sides had feuded over the issue since 1982, when the line was controlled by Penn Central. In 1997, the NYCDOT commissioner stated that signals would be installed during an upcoming phase of reconstruction in the Grand Central area. The $35 million project, whose cost was split between Metro-North and the city, was approved by the MTA Board later that month. It called for the installation of 12 pedestrian signals and 8 traffic signals at the eleven intersections and the renovation of the sidewalks and streets around Grand Central to prevent rainwater from seeping into the tunnel. Car traffic in this area had been controlled by traffic lights on a pole at each intersection in the middle of the median, instead of the usual four from each direction, resulting in a relatively high rate of pedestrian injuries. Additional traffic lights and pedestrian signals had not been added because this area of Park Avenue was located directly atop the roof of the Park Avenue Tunnel, with the street being above the roof in some locations. Because the roof was thick, there was not enough room to provide a foundation for the traffic poles without puncturing the structure. Due to the high cost of making these upgrades, and the lack of cooperation between the New York City Department of Transportation and Metro-North, which had opposed any solution that would modify the tunnel roof. The project had been estimated to cost $200,000 per intersection in 1994. As part of the new agreement, Metro-North designed a way to anchor the traffic signals in the deck and tunnel roof.