Anytime large vehicles occupy the same space as pedestrians and bicyclists, bad things can happen. When a fatality occurs, it is usually because an individual falls into the exposed space along the sides of high-clearance trucks and get crushed beneath the rear wheels. On construction and mining sites, companies are able to limit the interactions between people and trucks. On the average road or city street, though, such control is virtually impossible. The combination of truck blind spots and distracted driving, walking, and even bicycling is a recipe for disaster. For decades, many countries have had ordinances in place that require large vehicles to be equipped with side guards covering this open space along the sides of vehicles. Only in the last few years have these ordinances started to appear in cities across the U.S., but there is growing momentum.
