in 2009, pa 39 was widened to five lanes (two lanes in each direction with a center turning lane) when a new shopping center near the intersection of pa 39 and progress avenue was built. at the same time, west hanover township made improvements to the area surrounding pa 39's interchange with interstate 81. prior to the improvements, there was only one traffic light in the vicinity, located at jonestown road. several traffic lights and two additional lanes with a center concrete barrier was added to handle the increased truck traffic caused by the construction of warehouses nearby in 2003 and 2004.