New Hampshire has adopted Part 393 of the Federal Motor Carrier Safety Regulations (FMCSRs).
Part 393 applies to any self-propelled or towed motor vehicle used on a highway in intrastate and interstate commerce when the vehicle has a gross vehicle weight rating, gross combination weight rating, gross vehicle weight, or gross combination weight of 10,001 pounds or more, or is of any size transporting a placardable amount of hazardous materials.
| First Aid Kit | Not required |
| Mudflaps | Suitable fender guards or flaps which effectively reduce the throw, spray, or splash likely to be emitted from any tire or wheel are required on vehicles which are not equipped with proper fenders to prevent the throw, spray, or splash of water, dirt, or other matter. |
