Computers and parts accounted for the top commodities hauled by trucks between all three Canada-U.S.-Mexico Trade Agreement partners, at $13.4 billion, followed by electrical machinery at $10.7 billion, and vehicles and parts at $8.8 billion.

About $8.9 billion of the total truck traffic crossed at Windsor, Ont., while another $5.7 billion crossed the border at Sarnia, Ont. Only the U.S.-Mexico crossing at Laredo, Texas, was busier, accounting for $17.4 billion in freight.

References:

https://ontruck.org/trucks-shipped-32-5b-in-canada-u-s-freight-this-june/