The idea of commuter rail barely gets lip service in metro Atlanta, but Florida has just opened another new line, this one serving metro Orlando. Today, a supporter trumpets the economic development  that has accompanied the SunRail project, as well as the promise of relieving congestion along I-4. A Florida State University professor writes about the high costs of construction and operations, and how metro Atlanta's density doesn't merit this transportation option.

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Waymo autonomous vehicles operate across 65 square miles inside I-285 and have been involved in six incidents with Atlanta Public School buses since May. Waymo issued a recall because of their cars briefly stopping or slowing down before continuing forward while a bus was stopped and flashing its lights. (Courtesy of Atlanta Public Schools)

Credit: Courtesy of Atlanta Public Schools