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Happy Junction
Six Flags America
Location Largo, Maryland, USA
Status Defunct
Operated 2010 to 2022
Rider height 36 inch unaccompanied
Statistics
Manufacturer Zamperla
Product Convoy
Capacity 4 per car
Track length 410 feet

Happy Junction (formerly Diesel Derby) was a Track Ride built by Italian manufacturer Zamperla that was formerly located at Six Flags America in Largo, Maryland, USA.