Percent of public transporation expenditures spent on selected modes of transporation, by region, 1997 Airline Mass Ship train transit Intercity Northeast 50.2 28.8 5.7 4.7 Midwest 66.5 8.0 9.8 6.2 South 68.5 8.1 5.1 6.0 West 70.9 7.9 6.8 5.0