Access Nuclear Bus [PS2 Cheat by: zachary carnessz]
Go to options menu, hold L1+R1 and press triangle, triangle, square, x

Unlock all leveles [PS2 Cheat by: paulo]
Press up,up,down,up,up,up,down,down,up,down

Change date
[PS2 Cheat by: sajun poar ]- verify please ?
Change the date on your ps2 configuration to 25th december to unlock apu's xmas car !!! also works on 1st january for krusty!! and halloween but i forgot the date so you can work that one out, this unlocks barts frankinstien soap box racer !! iant i so clever!!!

To get smithers w/Burnse's car [PS2 Cheat by: Anon]
Hold L1+ R1 Press Triangle Twice + Square Twice To Get Smithers Driving Burnse's Car (You Have To Be On Options)

PS2 Cheats for Simpsons Road Rage

Simpsons Road Rage cheat codes

Simpsons Road Rage cheats