Inspect all US bound trucks and ban all that do not meet US standards. Mexico needs to send stuff north more than we need to send stuff south.
Build the double fence. Mexico needs to send people north more than we need to send people south.
The arbitration panel, in 2001, said that the US can set standards and exclude any Mexican truck that doesn't meet those standards.
But, the US can't exclude all Mexican trucks only because they are Mexican trucks. Nor can the US set higher standards for Mexican trucks than are set for US trucks.