What does the trucker girl stand for?
It’s not supposed to “stand for” anything in particular. It’s just a stylized silhouette of a woman. It became popular in the over-the-road trucking industry as an accessory, just as a fluke. Some people find it oddly tantalizing. Others find that it illustrates a highly unrealistic female body image, and believe its appeal is sexist. I found an interesting take on the imagery here: http://www.feministing.