Junction

The Junction is a sub-level that appears in Sonic Dash 2: Sonic Boom. As implied by its name, it is the game's connecting hub link which the player can enter to switch level and characters.

Overview
The Junction is a simple rock tunnel with no holes in it, making it dimly lit. The floor is flat and various flat, grey stones cover every surface. When entering the Junction, its exit will be covered in darkness until the area's procedures has been completed.

In the first versions of Sonic Dash 2: Sonic Boom, the exit was covered in what appeared to blue fog rather than darkness.

Gameplay
Junctions serve three primary purposes in gameplay. By entering a Junction during a run, the player can move from one level to another. Which level a Junction leads to is indicated by the image on the sign that appears just before the player can enter it.

Upon entering a Junction, all the Rings the player have in their position at that point in time will be banked. As the player's lead runner moves through the Junction, the other two chosen characters for the current run appear next to the lead runner, and the player is given the choice of which of these characters they want to take control of. Upon making a choice, the player then automatically exits the Junction.

Description
The player can only enter a Junction by taking the exits splitting off from the road during a run. These exits are marked by the Junctions' trademark signs. Upon entering these exits, the player automatically moves down the lone lane into a hole in the wall leading into the Junction. When leaving the Junction, the player will emerge on the middle lane of the incoming level's main road.

Trivia

 * The Junction is the only time during a run in Sonic Dash 2: Sonic Boom where multiple playable characters appear side-by-side.