Although we can be nostalgic about passenger trains and the allure of riding at ground level across the country in rolling palaces, I think we have a tendency to forget a major fact. When the U.S. Postal Service stopped transporting and sorting mail on the trains the major source of revenue that kept the passenger trains running on most railroads was eliminated. This was especially true on the Frisco. Revenue from ridership was not sufficient to justify continued service without the supplemental income that the mail service provided. The size of our country, coupled with the large return home of soldiers and pilots from the war(s) and the movement to increase and improve the nation's highways in the interest of improved national security, the time was ripe for the rise of other sources of transportation for goods and people that ultimately doomed the railroad passenger service.