Motorcars Maniacs

Cheats

UnderGround Shortcut
  Locate the loop that is halfway through the first lap of Route 2A. There is
  dirt on the left and a ramp to the right. At this location, press B, B, B, B
  while on the loop. You will go underground after exiting the loop.

Hint by Felipe Gerhard - felipe.gerhard@gmx.net