Frequently Asked Questions
The Frequently Asked Questions (FAQs) are questions and answers about Compliance,
Safety, Accountability (CSA) that the Federal Motor Carrier Safety Administration
(FMCSA) compiled to assist the public. As questions come in through the website,
FMCSA adds them to the database along with their answers. If you do not see your
question or topic addressed, please
by submitting a feedback form. We will respond to you directly and consider your
question for inclusion in the FAQs.
The FAQ area has recently been enhanced. Users can now search FAQs by stakeholder
group, topics (displayed on the left side of the page), or by entering a keyword
below. Choosing “Show All” will display the entire collection of FAQs.
How can motor carriers, drivers, and other stakeholders request a review or correction of data in the Safety Measurement System?
The Federal Motor Carrier Safety Administration (FMCSA) has
developed a specific mechanism to facilitate data reviews. Requests for data reviews
(RDRs) can be made through the DataQs system, an electronic filing system that
motor carriers, drivers, and the public use. The first step is to register
either at the DataQs website (https://dataqs.fmcsa.dot.gov/), or via the FMCSA Portal.
Instructions for filing an RDR are provided, and include simple forms and the
submission of information such as the report number, date, and time of the
event, State, explanation, and supporting documentation, if needed. Once filed,
the RDR and all relevant documentation are routed to the organization
responsible for the data, and electronic correspondence is used to communicate
with the requestor. The DataQs website is open to the public and offers an
online help function to walk users through the process.
Note: A carrier can modify registration information (e.g., name, address, or
Power Unit data) by updating the MCS-150