Yes. Texas truckers are held to a higher standard than other motorists in the state. They must meet certain vision requirements, pass drug screenings and be in control of their diabetes and blood pressure. Find out more about what Texas requires in order for truck drivers to be considered physically fit in this article. If a trucking company did not hold their employee to these physical standards, not only could it have been the cause of your 18-wheeler accident, but that employer could be considered negligent and liable for your injuries in the eyes of the law.