When doing race events in career mode, there is a way to change the amount of traffic, catch-up on/off, and number of laps.
For example, there is a race in "Race events" in the blacklist menu. It is a sprint type race, and the track is "Seagate & Camden". Go back to the main menu, and select quick race. Select custom race, and do a sprint on "Seagate & Camden". Set the options you want (i.e. No traffic, etc). Do the race. Go back into career mode and do that same race in the blacklist menu. Those options you selected in quick race mode will apply here. You can have no traffic, and turn off catch-up. It also means if you have a 4-lap circuit race in career mode, you can do this cheat and only have to do 1 lap.
Press the codes where you "Press Start" when the game is turned on.
Before you sell a car, go to a One-Stop Shop and reset all the exterior body parts (body kit, wheels, spoiler, hood, etc.) to stock. You will get a trade-in credit for the old custom parts and it will not lower the car's value when you sell it in the Safe House.
If you start a new career with a memory card with Need for Speed Underground 2 file on it you get extra money when starting out.
You will start campaign mode only being able to only
achieve Heat levels 1 and 2 (City Police). By defeating certain
Blacklist Rivals, you can then achieve the higher Heat Levels.
Watch your tachometer when at the starting line. Get your needle in the blue right when the race starts to get a perfect launch and gain some time against your opponents.
When you race any race that has maximum potential for police encounter, a police chase will ensue sometime during the race. After the race you will need to get away from them so that the win and money won will stay. To completely skip this sometimes tedious process after a race, wait until you see the "auto-save" icon at the top of the screen disappear. Once it has disappeared (completed auto-save), hit reset and reload your profile. The race will show complete along with the money credits in your bank account.
Beat These Blacklist Racers to get newer areas to drive.