According to forecasts by the Delaware Valley Regional Planning Commission (DVRPC), building the Lafayette Street interchange will reduce traffic at the Norristown interchange by approximately 20 percent and the Valley Forge interchange by about 4 percent. Reducing this traffic creates capacity for the office and commercial growth already expected to take place in Plymouth Meeting and King of Prussia over the next 10 to 15 years. Traffic also will be reduced on local roads such as Ridge Pike, Germantown Pike, US 202, Belvoir Road, and Sandy Hill Road.
