Roughly one-third of the U.S.-Mexico line, or 654 miles, has security fencing, according to extensive government reporting on the subject. There are just 354 miles of pedestrian barrier. The rest is vehicle barrier, low-lying posts designed to stop cars and trucks.
“Vehicle fencing has been effective in slowing and prohibiting drive throughs, vehicle fencing is not designed to slow or deter illegal entrants from entering or smuggling contraband,” a 2017 report from the Government Accountability Office states.
Drive-throughs? So the US is a "drive-through". Good grief we are so screwed.
The wall is worthless without support. That support is political, financial, technical, manpower, maintenance, and control of entry etc. It also includes massive reform of immigration and voting systems.