For all Oklahoma toll roads other than the Kilpatrick and Creek Turnpikes, tolls are collected from patrons based upon the classification of their vehicle. The classification is determined by the number of axles on the vehicle.

Class	Image	Description
Class 2		Any two-axle vehicle
Class 3		Any three-axle vehicle
Class 4		Any four-axle vehicle
Class 5		Any five-axle vehicle
Class 6		Any six-axle vehicle

For the Kilpatrick and Creek Turnpikes, classification is determined by Shape Base (SB), vehicle size, and number of axles on the vehicle.

Class	Image	Description
Class 22/SB Small		Any two-axle vehicle
Class 23/SB Medium		Any three-axle or four-axle vehicle
Class 23/SB Medium		Any three-axle or four-axle vehicle
Class 24/SB Large		Any five-axle or six-axle vehicle
Class 24/SB Large		Any five-axle or six-axle vehicle