Drive through any toll booth with any emergency vehicle with the sirens on. The booth attendant will open the gate, and you will save $5.

Drive a normal car up to the toll booth. As you get close, slow down and jump out while making sure the car passes through the booth. Then, walk past the booth, and get in your car.

While in a vehicle or on a motorcycle, drive up to the toll booth. Stay on the far side of the booth. Niko will stick his arm out but not put money in the basket, and the gate will still open.

Drive a motorbike to the side of the pay toll wall. You will not pay a toll if you can drive through the small gap on the sides.