It is worth noting that the US experienced its fastest economic growth since 1929 in the 1950s and 1960s, a time of high government expenditure on the Interstate Highway System, which was launched in 1956. As the system was completed, one could cross the country and reach its commercial hubs on high-speed expressways at 75 miles (120 kilometers) an hour.
美国1929年后的最快速经济增长阶段是20世纪五六十年代，当时正逢政府州际高速公路系统（1956年启动）支出高峰。如今，这一点根本没人重视。随着州际高速公路系统的完工，你可以以75英里（120公里）的时速穿梭在全美各大商业枢纽之间。