A little bus history for you:

In 1926, there were over 4,000 small independent lines running between selected cities. The same year Wickman and Orville Swan Caesar (both owners of many of these regional lines) amassed additional bus lines and created the Motor Transit Corporation. Four years later, this company officially became The Greyhound Corporation. Aided by an advertising campaign highlighting the various scenic and historic sites around the country, Greyhound saw ever increasing earnings. Greyhound had bus routes that covered the majority of the United States by 1936. The other national carrier at this time was the National Trailways System. Under the aegis of the National Trailways System were smaller lines, such as the Santa Fe Trailways, that primarily had been railroad-owned bus lines.