'Tremors' roller coaster at Silverwood re-opens to the public Saturday 'Tremors' has been upgraded to include new trains, a steel track and a second train to provide a smoother riding experience.

The world’s first fourth dimension roller coaster will remain open throughout the annual rehabilitation and maintenance.

Daily operation has officially commenced at Six Flags Great America in suburban Gurnee, with thrill-seekers anxiously awaiting the full opening of the park’s newest roller coaster. “Wrath of ...

Daily operation has officially commenced at Six Flags Great America in suburban Gurnee, with thrill-seekers anxiously awaiting the full opening of the park's newest roller coaster.

The coaster’s signature element is a 61-foot-long piece of steel track that slowly rotates from horizontal to vertical and holds you hanging 160 feet above the pavement.