Great American Scream Machine

Great American Scream Machine is a wooden roller coaster located at Six Flags Over Georgia. The 105-foot -tall ride reaches a top speed of 57 miles per hour . GASM, as it is known to park workers, was built by the Philadelphia Toboggan Coasters in 1973 with Marvin M. Black & Sons as the contractor. When it opened, it was the tallest, longest and fastest roller coaster in the world, and riders were given a "Red Badge of Courage" button for riding the coaster. Recently, on May 21, 2017, Great American Scream Machine received an ACE landmark for it being the first wooden roller coaster built by Six Flags and for being at the park for a substantial amount of time while being well maintained.
A computerized block system is used to prevent trains from contacting each other. GASM has 5 blocks: Station, Transfer Table, Lift, Main Brake, and Ready Brake. Normal operation uses two trains; however, it can be operated with only one. During two-train operation, if the train in the station has not fully exited the loading platform, the inbound train will stop abruptly in the Main Brakes. A combination of proximity switches, mechanical switches, photoelectric sensors, and timers are all used by the controller to track train movements.

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