All symbols are closely related to the subject, as they are somewhat related to driving. In fact, there is an exception - a pair of red dice - but fortunately there is no Aces, Kings or Queens. The Highway Kings logo is shown in yellow in the top of the screen with large trucks on either side. Trucks are the main sign of wealth in this game, although you can earn good grades by finding matching combinations of other symbols.
Red trucks are wild and can replace all symbols to help you win prizes. In addition, wild doubles any victory, it helps to form, but not cumulative. In other words, the two wild symbols still multiply the victory by 2 instead of 4. The red truck symbol appears only on the center three reels.