You are at Exit 86 at the Truck stop in Monahans,Tx and that trailer that you see is call a super hopper trailer and the two red trailers are sandboxes for the oilfield 😊
When you stopped on I-20 in West Texas for fuel and a shower, you were in the oil patch where you tripped over rigs running fracking sand, carrying old fracking water, or loaded with sand boxes for oil and gas drilling. That is evidence of "drill, baby, drill," which most of us in California will never benefit from.