Just look at the picture on the article page. How many cabovers do you seen running the US roads? They buy wore out US junk trucks and haul them to Mexico. Use bailing wire and whatever they can find and keep them going.
You can post all the articles and studies you want . I have seen it my own eyes.
What makes you think I haven't? The scrap metal trucks I saw without brake lights were the worst. And they'd always be leaving the plant in the evening when I did. I say anyone who thinks the Mexicans have a corner on unsafe trucks are smoking Mexican ditchweed.