Hey OP,
How would you react if the wall was built half a mile north of your home and you had to drive 45 miles east to the closest checkpoint to go North? How would you like all the illegals and drug mules staging in your back yard trying to cross into El Norte?
How many people would have the issue getting North? You are talking about people in extremely remote areas..Give them access through a gate in the wall with a code. A woman in Texas already got this with a lawsuit when they put the wall on her land...You could still make it dang near impossible to smuggle drugs or people on or off I10 with strategic checkpoints on I10 and entry/ exit ports on all the state highways that feed into it..
I-10 goes thru Phoenix, let's cut that in half.
This thread title is " Why doesn't Trump build the Wall along the Interstate"
Is there a freeway along the border that I am not aware of?
From Wiki-
Interstate 10 (I-10) is the southernmost cross-country Interstate Highway in the American Interstate Highway System. It stretches from the Pacific Ocean at California State Route 1 (Pacific Coast Highway) in Santa Monica, California, to I-95 in Jacksonville, Florida. Major cities connected by I-10 include (from west to east) Los Angeles, Phoenix, Tucson, El Paso, San Antonio, Houston, Baton Rouge, New Orleans, and Jacksonville.