Texas DOT does care about and enforce GCRW. You don't see any 1 ton pickups hauling back hoes on tandem axle trailers any more.
Last level 2 TXDOT random inspection I had on my 18 wheeler the officer looked at the door spec plate and checked every tire on my truck and trailer to make sure it was at or above manufactures specs.
They are looking hard for revenue. He didn't get any from me that day.