Step 1: About the game
There are Log's hidden round the city there are 12 in each city if you collect them then you'll get you something cool. the Logo is in picture 2.
There some special move you can get for certain types of vehicle these are them:
Roar: Muscle cars and Choppers
Agro: SUVs, Trucks, and Luxury Sedans
Zone: Import and Exotic cars, as well as Sportbikes