FMCSA estimates there will be between 4 and 6 million users of the coming Drug & Alcohol Clearinghouse.

This estimate includes drivers, motor carriers, third party service agents and drug program administrators, medical review officers, substance abuse professionals, and enforcement personnel.

FMCSA data suggests there are approximately 6.2 Million CMV drivers in the U.S.

• 3.2 million interstate CDL drivers
• 1.0 million intrastate CDL drivers
• 600,000 interstate non-CDL drivers
• 1.4 million intrastate non-CDL drivers