Route 101
From Sonic Retro
Route 101 is the ninth stage of the Hero storyline of Sonic Adventure 2 and the third stage playable with Miles "Tails" Prower.
Purpose
Back in Station Square, Amy and Tails are on the phone to Sonic. Tails reckons that the stolen Chaos Emeralds have been taken into space for use on the ARK by Robotnik and Shadow. Suddenly, Knuckles climbs out of a manhole right next to them, saying he must have gotten lost in the mines. Tails then tells Sonic he wants to catch up with the President's limo; he transforms the Cyclone into a racing car, the Whirlwind S7, to do so!
Gameplay
The controls for the stage are straightforward. Use 
to accelerate; when turning, tap then hold it down to start a powerslide, which is useful on corners. You can stop sliding by releasing the analog stick for a second. 
activates a 5-second boost, which is received for every twenty rings collected. The course consists of three laps with a 90-second extension after each lap.
Appearance
Checkpoint Requirements and Ring Count
| Checkpoint | Time (s) | Rings |
|---|---|---|
| #1 | 60 | 88 |
| #2 | 80 | 104 |
| #3 | 80 | 78 |
Unlockables
If this level is beaten before Route 280, the Kart Race minigame will become available; if it is beaten after Route 280 the 2P Kart Race minigame will become available.