1. Navigate to one.dat.com
  2. Click on the Create account option
  3. Complete the form by entering your email address and choosing a password to use.  Remember to check the box for Terms & Conditions prior to clicking SIGN UP.
  4. Next, select your authority type:  MC, or DOT. Depending on your selection you'll be asked to provide your DOT or MC, before clicking CONTINUE 
  5. Now fill in your company information and user information and click CONTINUE
  6. You will now receive confirmation that your account has been created.  Remember to check your email to verify your email address by responding to the email sent by DAT.  Once finished, you can sign in