Here are some cheats and tips for the game San Francisco Rush.
Turn Cones into Mines:
For explosive action, quickly press L, R, L, R, L, R on the SETUP
screen. This code turns the cones into mines that blow up anything
that hits them. Drive safely!
Turn Tracks Upside-down:
To turn the track upside down, quickly press Up, Right, Down, Left,
Down, Right, Up, Left on the SETUP screen.
Foggy Night
Go to the Options screen and change “Fog” to the Heavy setting. Then
hold all four C buttons and press right on the Control Pad. You
should now have access to Foggy Night.