Congressional investigators say there's a problem of unfit truck drivers on the road.

A study expected to be released at a House Transportation Committee hearing today says it's so easy for truckers to fake a medical certificate that there's almost no incentive to get a real one.

Officials from the Federal Motor Carrier Safety Administration will be on hand to explain why they haven't fully implemented recommendations made nearly seven years ago to keep medically unfit bus and truck drivers off the road.

Statistics show that seizures, heart attacks and other ailments have been factors in thousands of serious truck accidents.

No database or central repository exists allowing state inspectors to verify the legitimacy of a medical certificate.