You can also check the payment values associated with the combination of three, four, and five matching symbols by clicking on the Payment Form at the bottom of the screen.
There are 11 symbols in the highway king, each symbol representing a different salary value. Icons include steering wheel, tires, bolts, a pair of tweezers, air pumps, petrol cans, jumpers and three different color trucks: one green, one yellow and one red. Some symbols in Highway Kings offer bonuses for combinations of three or more, but the higher-income icons are only two matching rewards. The most generous sign on the board - the red truck - even pays two points for a single symbol on the reel.