Residents of Chattanooga, Tenn., have access to Internet speeds of one gigabit per second—more than 50 times faster than the rest of the country, leading it to be nicknamed “Gig City.” If Chattanooga were a country, it would be tied for the fastest Internet connection in the world with Hong Kong. The rest of America comes in at 26th, behind Singapore, Romania, Japan and Sweden. Residents of surrounding areas are envious because the service, which is provided by the city’s public utility company, is prohibited by state law from expanding beyond city lines. Chattanooga is one of several cities—including Lafayette, La., and Wilson, N.C.—that has built its own municipal high-speed broadband networks. These cities have been cited as success stories among local governments, taking action to provide faster Internet speeds for residents and to encourage economic development.