The National Highway Traffic Safety Administration (NHTSA) is the highest federal authority in the DUI/DWI field. After reviewing the major DUI/DWI offender tests, NHTSA rated the Driver Risk Inventory (DRI), the best (DOT HS 807 475). Now, after years of additional research the DRI has been improved. The DSM-5 substance use disorder has been added, and the length of the test has been shortened, while improving its already impressive reliability, validity, and accuracy. This improved test is the Driver Risk Inventory-2 (DRI-2).