Vehicle Classification Information

Vehicle classification is based on the height of the vehicle over the first two axles and the total number of axles, including any towed vehicles or trailers.  Vehicles under 7 feet 6 inches in height are considered “LOW” (L).  Vehicles 7 feet 6 inches in height or greater are considered “HIGH” (H). The total number of axles plus the height designation equals the vehicle class as shown in the table (Figure 1) below. The diagram (Figure 2) below  shows approximate vehicle heights in relation to the toll booth. Another diagram (Figure 3) further below shows examples of axle counts on various vehicles.   Example: Most two-axle passenger vehicles are Class 2L.

Helpful information can also be found in the Frequently Asked Questions.
 

Figure 2 -  Diagram showing approximate vehicle heights in relation to the toll booth

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Figure 3 -  Examples of axle counts on various vehicles

5 axles

 

2 axles

 

3 axles