Warp Gate

You may be looking for Transformation Gate or Gate.

Warp Gates are gates in Sonic & All-Stars Racing Transformed which represent each world present in the World Tour mode of the game. They are basically teleports on the map of each chapter, allowing the player to switch between different chapters if the player has achieved all the missions of the respective chapter. Warp Gates are large holographic versions of the original gates that represent their chapters.

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The Warp Gate of Sunshine Coast. The Warp Gate of Scorching Skies. The Warp Gate of Frozen Valley. The Warp Gate of Twilight Engine. The Warp Gate of Moonlight Park. The Warp Gate of Superstar Showdown.