Work information will stay in a DAC file for 10 years. This is the companies that you have worked for that report to DAC.
Your safety record as reported by companies you have driven for will stay in there for 7 years.
Your MVR is actually a separate entity and every time a perspective employer orders a DAC report on an applicant a new MVR is ordered from the state you have your CDL from and from any other states you have had a DL in during the period of time the employer is wanting to know about....ie 3 years, 5 years or 7 years.
So once a traffic citation drops off your MVR report from the state it will not be on a DAC report that is ordered by a company you have applied for.
Regardless of how long something may or may not be kept in a DAC file you need to carefully read every application you fill out and give the company you are applying for the information they are seeking.
For example some companies may ask for any traffic convictions in the last 3 years while others will ask for 7 years. Same goes for any accidents you have been involved with. Some may want only the last few years and others may want to know about lifetime.
Regardless of how long something may or may not be kept in a DAC file you need to carefully read every application you fill out and give the company you are applying for the information they are seeking.
For example some companies may ask for any traffic convictions in the last 3 years while others will ask for 7 years. Same goes for any accidents you have been involved with. Some may want only the last few years and others may want to know about lifetime.
Lifetime is a problem. I don't know what my 4 wheel past my current state is for 11 years. Don't know how to get previous states without valid license. And think most background checks on the web are bs. The ONLY thing that matters for 4 wheelers is DMV and can't get from prior states. Its past 20 years whatever it is.
MVR's depend on the state. Some hold 3, others 5, 7, 10, or forever. States that I know never drop information are Massachussetts, Missouri, and Pennsyvlania.
Your best bet is just to remember what you've had for the past 3 to 5 years. Any other info, the company can pull it.
Also, how long something may stay on your MVR can depend on the violation. For example a reckless driving conviction or an excessive speed conviction (15 mph or more over) may stay on for 10 years or more while a a basic conviction of lets say 5 mph over may drop off in 3 years. It all depends on how a particular state has things set up.
As has been mentioned many times before, read the applications carefully and give only the information required.