I understand in most states to get a Handicapped Permit you have to present a doctors certificate to the DMV to get one, some states waive the requirement in cases that are obvious.

Perhaps it could be something like a prescription. The Professional sends a certification under penalty of perjury to DOT automated system that issues a document to the person's cell, email, or fax. I often get prescriptions filled the same day by the Doctor sending it directly to the pharmacy of my choice.That would facilitate tracking Professionals who sign off on thousands of them. DOT could take action or refer the Professional to their licensing board Similar to the way insurers track benefits or DEA tracks narcotics. What we have now is basically an honor system that isn't working because when it was started no one envisioned the situation that developed.