Not only are there several rules in place through the federal government which help to ensure that construction sites and workplaces where heavy equipment is used are safe, there is actually an entire category of methods used by companies to ensure employee safety. From training on proper equipment which may require extensive test drives to protective clothing like Carhartt flame-resistant clothing that might be used in a high risk area, it's often the case that large companies may employ someone whose entire job description involves keeping employees safe on the job while ensuring that the site works smoothly and that all equipment is operated properly.