Transit service that is useful to most people satisfies seven basic criteria: • The service goes where you want to go. • The service runs frequently enough that you don’t have to think about it. • The service is reasonably fast. • The service is reliable (you don’t have to worry about major delays). • You can conveniently walk from the service to

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The western rail lines were built with the same kind of tracks (standard gauge, with rails 4 feet, 8½ inches apart), so railcars have always been able to move freely between the two countries—for all that it crosses a national border, it’s a single network. In contrast, before the U.S. Civil War, trains in the American South mostly ran on a broad

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