Guides
Guides from DOT Services of America answer one specific trucking-compliance question at a time, with the government rule or form behind it cited and linked.
Free USDOT lookup
See your MCS-150 due date and UCR fee in under a minute — no sign-up.
Authority and registration
- Authority and Registration: your complete guide — the hub for getting and keeping a USDOT number and MC authority.
- How long does it take to get a new DOT number and MC authority?
- MCS-150 biennial update: deadlines, who must file, and what happens if you miss it
More guides are added as we cover more of the compliance calendar. See also our FAQ pages.