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Mississippi trucking rules

Fees, CDL costs, weight and size limits, chain laws and new bills for truckers and trucking companies in Mississippi. Updated 2026-10-22.

Must-know rules · Weight, oversize & chains · Fees · Bills

Must-know rules

Mississippi's rules are mostly federal-standard (80,000 lb, 8'6" wide, 13'6" high). Its own quirks are a 45 mph truck cap in bad weather, a texting-only state ban (federal CMV handheld rules still apply), enforcement by the Department of Public Safety (not MDOT), and IRP/IFTA run through the Department of Revenue. I could not confirm chain/traction rules, idling limits, hazmat tunnel rules, or any weight-distance tax from official pages, so those are left out.

Researched by our AI agent from the linked sources on 2026-10-21. Always confirm with the source.

• Must knowTruck speed limit in bad weather

  Trucks, truck-trailers and passenger buses must slow to 45 mph when visibility is bad in inclement weather (Miss. Code § 63-3-505). This comes from a 2013 federal summary, so check the current statute. I could not confirm current posted truck-versus-car limits from an official source.

  NHTSA DOT HS 811 769: Summary of State Speed Laws, 12th Edition (2013)
• Must knowLegal size limits and when a permit is needed

  Permits are tied to loads over 8'6" wide, 13'6" high, 99' long, or a trailer over 53'. Vehicles over 99' need a permit and a front and/or rear escort. Trailers over 53' need an oversize permit.

  MDOT Over-Dimensional Permit Rules (Sub-Part 6601)

Weight limits, oversize permits and chain laws

Our agent is still researching Mississippi's weight, size and chain rules. Check back soon.

Fees and DOT requirements

Mississippi's CDL fee is low ($55 for five years, the same for Class A and B). Truck registration is a weight-based highway privilege tax, with an extra tax on newer heavy trucks. For-hire carriers that operate only inside the state must register with MDOT. I could not confirm some items from an official source: the knowledge and skills test fees, the intrastate USDOT rule, whether a weight-distance tax exists, and how often the MDOT registration renews.

Class B CDL

$55 for 5 years (about $11 a year)
DPS lists a CDL learner's permit at $16 (valid 6 months), each endorsement at $5, and a hazardous materials fee at $100. DPS does not list knowledge-test or skills-test fees on the fee page. Third-party sites say $5 per knowledge test and a third-party examiner charge for the skills test; I could no Source

Class A CDL

$55 for 5 years (about $11 a year)
The DPS fee page lists a single CDL fee that is not split by class, so Class A and Class B cost the same. The $16 permit, $5-per-endorsement and $100 hazmat fees are the same as for Class B. Class A applicants for combination trucks normally take the combination-vehicles knowledge test. I found no o Source

Registration, 26,001 lb straight truck

$300 a year Source Non-government source

Registration, 80,000 lb combination

$1,512 a year Source Non-government source

How registration is figured

Annual highway privilege tax under Miss. Code 27-19-11, set by licensed gross weight bracket and by carrier type (common/contract carrier, private commercial, or private carrier). It is not set by vehicle value. For-hire (common and contract) carrier rates are used below.
The $300 is the 26,001-30,000 lb bracket for common and contract carriers. Private commercial carriers pay $247 and private carriers $150 in that bracket. The $1,512 is the 78,001-80,000 lb bracket for common/contract and private commercial carriers (private carriers pay $864). These amounts come from the 2020 code text on Justia. The current 2024 text showed only part of the table, so check that Source Non-government source

Intrastate operating authority

Mississippi Intrastate General Freight Operating Authority (MDOT motor carrier registration). Statute names: certificate. $50, $50 one-time filing fee for a new registration. A renewal ap.
MDOT's guidelines say carriers hauling property (not household goods or passengers) in Mississippi must file the application packet with MDOT. The $10 per-vehicle fee is waived for carriers that have paid UCR for that number of trucks. Household goods and passenger carriers use separate applications, and I did not find their fees. Insurance details come from a third-party summary (J.J. Keller), no Source

State DOT requirements

• Must knowIntrastate operating authority application and insurance

  MDOT's application form asks for USDOT and MC numbers and asks about UCR payment. The application is a $50 filing fee for new carriers plus $10 per vehicle, waived if UCR was paid. Insurance must be on file with MDOT.

  Application for Mississippi Intrastate General Freight Operating Authority (MDOT)

See all 10 DOT requirements with full access

Fees change; confirm with the linked state source. Compare all states.

New Mississippi trucking bills

No new trucking bills found here recently. The agent checks every morning.