In 1950, 7 million children were transported in 115,000 school buses. Fifty years later, 448,307 school buses transported 22,675,116 children more than 3,788,427,941 miles to and from public schools. Many of these were pupils with special needs. It is not known how many nonpublic school children are transported or how many school buses are used to transport them.
Public school transportation costs approximately $500 per year per pupil. Only Pennsylvania transports all school children at state expense. The fifty states spent $11,746,576,005 for the 1999–2000 school year, which included expenditures for transportation and capital outlay to purchase new or replacement school buses.