WASHINGTON — A survey by the U.S. Centers for Disease Control and Prevention found that nearly 70% of longhaul truck drivers are obese, 50% smoke cigarettes, 14% have diabetes and more than one-third have no health insurance.

Severely obese truck drivers are significantly more likely than their peers to be involved in preventable crashes in their first two years on the job, University of Minnesota  researchers said in a study published this month.