Transporting Livestock in Pennsylvania: Trailer Rules, Weight Limits, and Driver Requirements Explained

Hauling cattle to a sale barn, moving hogs between farms, or trailering horses to a new pasture — every one of those trips puts you under Pennsylvania’s livestock transportation laws the moment your rig rolls onto a public road. Getting it wrong can mean fines, an out-of-service order, or worse, animals injured in a preventable accident.

Pennsylvania draws its rules from both the state Vehicle Code (Title 75) and federal FMCSA regulations, and the two overlap in ways that catch even experienced haulers off guard. This guide walks you through every major compliance area — registration, trailer structure, weight limits, animal welfare standards, driver licensing, and roadside inspections — so you can load up and move out with confidence.

Livestock Trailer Registration and Identification Requirements in Pennsylvania

Before your trailer ever leaves the driveway, you need to understand how Pennsylvania classifies it and what paperwork must be on board. The registration path you take depends on who owns the vehicle, how it is used, and how far from the farm you plan to travel.

Farm registration plates and exemptions

To qualify for a farm license plate in Pennsylvania, a vehicle must be owned by a person or business engaged in agricultural operations as defined by state law. Under 75 Pa. C.S. § 1344, farm plates are limited to vehicles used exclusively for farming purposes, such as production, harvesting, or transporting agricultural products. PennDOT requires applicants to provide proof of agricultural activity, including tax documents or business records.

Vehicles with farm plates must be used exclusively for agricultural activities, including transporting farm products, livestock, feed, fertilizer, and machinery. This includes crops, livestock, feed, seed, manure, and essential machinery. Transporting non-agricultural goods is not permitted.

A trailer being towed for agricultural purposes is automatically exempt from registration — no prior determination of exemption by PennDOT is required. However, the trailer exempt from registration may only be used within 50 miles of any farm owned or operated by the owner of the vehicle. If you regularly haul beyond that radius, standard trailer registration applies.

Important Note: Farm-plated vehicles cannot be used to transport goods for others in exchange for payment or compensation, and they cannot be leased or rented out for transport — even if the cargo is agricultural in nature. Using a farm-plated rig for commercial hauling voids the exemption entirely.

Insurance requirements

If a farm-plated vehicle operates on public highways, it must carry at least the state’s minimum liability coverage: $15,000 per person for bodily injury, $30,000 per accident, and $5,000 for property damage. Failure to maintain required insurance can result in fines, registration suspension, and liability in the event of an accident.

Health and movement documentation

If you move livestock between properties, you need proper documentation — it functions similarly to a passport for your animals. In Pennsylvania, you cannot simply haul your cattle to another farm without official records. The state tracks animal movement to prevent disease spread. When you move livestock, you need an official document called an “animal movement record” or “transport certificate.” Your veterinarian or the state agriculture office can help you get one. It is not complicated, but it is required.

For interstate shipments, health certification of animals transported in interstate or international commerce must meet the requirements of the state or country of destination and applicable USDA-APHIS regulations. A Pennsylvania health certificate (AAI-13) used for this purpose must comply with these requirements and be forwarded to the Pennsylvania Department of Agriculture for validation prior to interstate movement.

You can find more about how Pennsylvania regulates animal ownership and movement in our guide to goat ownership laws in Pennsylvania, which covers documentation requirements for smaller livestock.

Structural and Safety Standards for Livestock Trailers in Pennsylvania

A roadworthy livestock trailer is more than a box on wheels. Pennsylvania’s inspection code under 67 Pa. Code Chapter 175 sets minimum structural standards that apply every time your trailer hits a public road.

Braking systems

Pennsylvania sets the threshold at 3,000 lbs for needing brakes on all axles. If your loaded livestock trailer exceeds that gross weight — which most do — every axle must have functioning brakes. Surge brakes and electric braking systems are both legal options, but the system must be properly installed, tested, and maintained.

Chassis and body integrity

All items on the chassis must be in safe operating condition. The vehicle frame must be in solid condition. Inspectors will reject any trailer with a cracked or compromised frame, loose body panels, or structural components that cannot safely contain animals under load.

A trailer whose body has a rear end clearance of more than 30 inches from the ground when empty must be equipped with a rear bumper or rear end protection device. This requirement applies to most full-size livestock trailers and is a common citation point during roadside checks.

Lighting and nighttime operation

If used during nighttime, the trailer must have and operate at least one yellow revolving, flashing, or strobe light visible to drivers from any direction and hazard signal lights. All standard running lights, brake lights, and reflectors must also be fully functional before you depart.

Pro Tip: Before every trip, have a second person walk around the trailer while you cycle through all light functions — brake lights, turn signals, running lights, and hazard flashers. A burned-out bulb is one of the most common reasons livestock haulers receive roadside citations in Pennsylvania.

Coupling and safety chains

Your hitch must be rated for the gross trailer weight and properly secured. Safety chains must be crossed under the tongue and connected to the tow vehicle’s frame — not just the hitch receiver. A charged breakaway battery that engages the trailer brakes if the trailer separates from the tow vehicle is required on trailers equipped with electric brakes.

For a broader look at how Pennsylvania animal laws intersect with property and liability, see our overview of animal cruelty laws in Pennsylvania.

Size, Weight, and Load Limits for Livestock Trailers in Pennsylvania

Pennsylvania enforces strict dimensional and weight limits under Chapter 49 of the Pennsylvania Vehicle Code. Exceeding these limits — even by a small margin — can result in fines, permit requirements, or being placed out of service at a weigh station.

Width and height

A single vehicle may not exceed a width of 8 feet, 6 inches. Any truck and tractor combination may not exceed a width of 8 feet, 6 inches. No vehicle, including farm trucks and truck tractors, may exceed 13 feet, 6 inches in height. Most standard livestock trailers fall within these limits, but double-deck configurations for hogs or sheep can approach the height ceiling quickly when animals are loaded.

Length

No individual motor vehicle, including farm trucks and truck tractors, may exceed a length of 40 feet, including load and bumpers. For a combination consisting of a single trailer and a tractor, the length of a single trailer may not exceed 53 feet, provided the distance between the kingpin of the trailer and the centerline of the rear axle or axle group does not exceed 41 feet.

Gross weight limits

Vehicle Type	Maximum Gross Weight	Notes
Individual vehicle (including farm vehicles)	80,000 lbs	Subject to registered gross weight and axle limits
Any combination (truck + trailer)	80,000 lbs	Also subject to bridge formula and road restrictions
Trailer requiring brakes	Over 3,000 lbs GVWR	Brakes required on all axles above this threshold

These limits are subject to the registered gross weight of the vehicle, requirements regarding axle weight, and requirements regarding wheel load. Vehicles are also subject to any weight restrictions applied to particular roads or bridges. A vehicle may only be operated outside these limits with a permit from PennDOT.

Projecting loads

The load on any individual vehicle may not extend more than 3 feet beyond the front of the vehicle and no more than 6 feet beyond the rear. If a load extends more than 4 feet beyond the rear, a red flag or cloth no less than 12 inches square — or, at night, a red light — must be attached to the projecting load. Livestock trailers rarely trigger this rule, but it applies if loading ramps or other equipment extends past the rear of the trailer while in transit.

Common Mistake: Many farmers assume that a farm registration plate exempts them from all weight and size limits. It does not. There is no exception for farm vehicles when it comes to the core dimensional limits under Chapter 49. Farm plates reduce registration fees and provide certain exemptions, but the physical size and weight ceilings still apply.

Ventilation, Flooring, and Animal Space Requirements in Pennsylvania

Pennsylvania law holds you legally responsible for the welfare of any animal under your supervision during transport — whether you own the animal or not. Proper trailer conditions are not just good husbandry; they are a legal obligation.

Ventilation

The truck or trailer needs proper ventilation and must protect animals from injury during transport. Adequate airflow prevents heat buildup in summer and reduces respiratory disease risk year-round. Too many animals in a trailer can cause poor ventilation, leading to respiratory diseases, bruising on animals, or even downed animals.

Ventilation panels, slats, and adjustable vents should be checked before loading. In hot weather, haul animals in the cool part of the day — mornings or evenings.

Cold weather precautions

In cold weather, windchill can kill livestock. Hogs and calves are especially susceptible. Do not transport these animals on frigid days unless absolutely necessary. Avoid dangerous crosswinds on the trailer by plugging some of the air holes. Use straw to keep the animals warm.

Flooring standards

Flooring and floor beds must be of a construction that supports occupants and cargo which the vehicle is capable of carrying, and may not have any openings through which exhaust gases could enter the passenger compartment. For livestock trailers, this standard also means no gaps or rotted planks that could trap a hoof or allow an animal’s leg to break through the floor during transit.

Avoid using trailers with wooden floors, as they can create a dangerous surface for livestock. If you do use a wood-floored trailer, inspect every plank before each trip and replace any that show soft spots, cracks, or rot. Non-slip rubber mats are strongly recommended on top of any smooth surface.

Before transporting livestock, clean and properly disinfect the trailer to prevent spreading disease. Make sure there is no sharp metal inside the trailer.

Animal space and loading density

Do not overload livestock in the trailer — refer to industry guidelines, as proper numbers of animals will vary depending on their size. Cattle need about 40 square feet of shelter space each. Horses require similar amounts. Smaller animals like goats and sheep need less space, but not by much. These figures serve as practical benchmarks; loading above these densities increases injury risk and can constitute an animal welfare violation under Pennsylvania law.

In Pennsylvania, you have a legal obligation to properly care for animals under your supervision, whether you own the animals or not. That obligation does not pause when the animals are in transit.

If you raise goats or sheep and need a refresher on ownership standards that carry over into transport, see our guide to goat ownership laws in Pennsylvania and our article on backyard chicken laws in Pennsylvania for poultry-specific context.

CDL and Driver License Requirements for Hauling Livestock in Pennsylvania

Whether you need a Commercial Driver’s License to haul your own animals depends on the weight of your rig, how far you are traveling, and whether you are hauling for hire. Getting this wrong is one of the most consequential compliance errors a livestock hauler can make.

When a CDL is required

A commercial motor vehicle requiring a CDL is defined as: a combination of vehicles with a gross combination weight rating of 26,001 or more pounds, provided the vehicle being towed is in excess of 10,000 pounds gross vehicle weight rating; or a single vehicle with a gross vehicle weight rating of 26,001 or more pounds.

A Class A CDL is required for drivers who operate combination vehicles with a trailer and a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more, provided the GVWR of the trailer is at least 10,001 pounds. This includes tractor-trailers, truck and trailer combinations, and certain types of livestock carriers.

The farm vehicle CDL exemption

Pennsylvania provides a critical exemption for farmers hauling their own livestock. A driver of a farm vehicle that is controlled and operated by a farmer and used exclusively to transport agricultural products, farm machinery, or farm supplies to or from a farm owned or operated by the owner of the farm vehicle is not required to obtain a CDL. The farm vehicle may not be used in common or contract carriage. A Pennsylvania farm vehicle may be operated anywhere within the Commonwealth.

If the actual weight and weight rating of your vehicle or combination do not exceed 26,000 pounds, you do not need a CDL, regardless of whether your vehicle or combination is farm or commercial. The only exception is when you are transporting hazardous materials in quantities that require hazmat placards to be displayed.

Interstate travel and the 150-mile rule

Drivers of covered farm vehicles operating over 26,000 pounds are exempted from CDL requirements if within 150 air miles of the farm of the owner of the vehicle. Cross that boundary, and CDL requirements apply regardless of farm registration status.

The farm driver exemption from CDL does not apply in situations where the farm truck or farm-truck-powered combination has an actual weight or weight rating of greater than 26,000 pounds and is being used in interstate travel more than 150 air-miles from the farm.

Key Insight: If you haul livestock for someone else — even occasionally, even as a favor with fuel reimbursement — you may lose the farm exemption entirely. If you are in any business for profit including with equines, like training, showing, or hauling for pay, you will need a Commercial or CDL license. Commercial may be interpreted as receiving any compensation, even as simple as winning a ribbon.

Non-commercial Class A license

A Class A Non-Commercial driver’s license is required for towing any trailer when the combined registered gross weight of the trailer and towing vehicle exceeds 26,000 pounds — even if the CDL farm exemption applies to your operation. This is a separate requirement from the CDL and applies to private haulers who are not operating commercially.

Age requirements

To be eligible for a CDL, applicants must be at least 18 years old for intrastate driving (within Pennsylvania) and 21 years old for interstate driving (across state lines). MAP-21 does not exempt drivers of intrastate-operated or interstate-operated farm trucks and farm-truck-powered combinations from having to comply with minimum age requirements established under federal regulations.

Hours of service and ELD exemptions for livestock haulers

Transporters of livestock and insects are not required to have an Electronic Logging Device (ELD) at this time. The statutory exemption will remain in place until further notice. Drivers do not need to carry any documentation regarding this exemption.

Motor carriers transporting livestock have been eligible to use the 150 air-mile exemption from the Hours of Service rules at the end of a trip since November 15, 2021. Therefore, the HOS rules are not in effect for livestock haulers between a point 150 air miles from the source of the livestock and a point 150 air miles from the place where the livestock will be delivered.

For related Pennsylvania animal law topics, see our guides on pet import laws in Pennsylvania and wildlife removal laws in Pennsylvania.

Passing Roadside Inspections With a Livestock Trailer in Pennsylvania

Roadside inspections are a routine reality for anyone hauling livestock on Pennsylvania roads. Knowing what officers look for — and preparing for it before you leave — is the difference between a quick clearance and an out-of-service order that strands your animals on the side of the highway.

Who conducts inspections and where

You do not need to commit a traffic violation to be pulled over. Pennsylvania allows random inspections of any commercial trailer, especially those used for work or hauling. Inspections may be conducted at a variety of locations, such as weigh stations, border checkpoints, a carrier’s terminal, or when a law enforcement official stops a commercial motor vehicle.

A full Level I roadside inspection covers both the driver and vehicle and typically takes 30 to 90 minutes, depending on circumstances. All inspectors must be certified to conduct roadside inspections as outlined by the Commercial Motor Vehicle Alliance (CVSA). CVSA developed the North American Standard Inspection Criteria, which outline procedures based on the level of inspection conducted.

Pennsylvania’s annual inspection program

In Pennsylvania, regular vehicle inspections are a critical component of trucking regulations to ensure safety and operational efficiency of commercial vehicles. These inspections are mandated by state law and must be carried out at least once annually. They cover a comprehensive checklist that includes the vehicle’s braking systems, tires, lighting systems, steering mechanisms, and cargo securement, among other critical elements.

The FMCSA has determined that Pennsylvania’s inspection program is comparable to, or as effective as, federal periodic inspection requirements — meaning a valid Pennsylvania inspection sticker satisfies federal compliance for motor carriers operating in interstate commerce.

What inspectors check on your trailer

• Paperwork: An external inspection begins with verifying ownership, legality, and proof of financial responsibility. Ownership and legality must be proven by a vehicle registration card, certificate of title, or manufacturer’s statement of origin.
• Flooring: An internal inspection of a trailer over 3,000 pounds registered gross weight will check the flooring and reject if the flooring and floor beds are not in a condition to support cargo.
• Brakes: Inspectors will pull the breakaway pin to verify trailer brakes engage and examine brake lining on each axle.
• Tires: Tread depth, sidewall condition, and inflation are all checked. Any tire marked “not for highway use” is an automatic rejection.
• Coupling: The hitch connection, safety chains, and breakaway cable are all inspected for proper installation and condition.
• Lights: All exterior lighting must function correctly, including running lights, brake lights, turn signals, and clearance lights.

Out-of-service orders

If a vehicle is declared “out-of-service,” violations or defects must be corrected before the vehicle may operate again. Carriers must sign and return the completed roadside inspection report within 15 days of the inspection, verifying all violations have been corrected. A copy of this report must be retained by the carrier for 12 months following the date of inspection.

Failure to comply with inspection requirements can result in significant penalties for truck operators, including fines and the possibility of being taken out of service until the vehicle is brought into compliance.

Pro Tip: If your trailer is road-ready and meets every safety requirement — brakes, lights, tires, hitch, and load securement — and your paperwork is in order, then inspections will be fast and painless. Build a pre-trip checklist and run through it before every haul, not just when you think you might get stopped.

Pre-trip checklist summary

1. Verify registration, insurance card, and health/movement certificates are in the cab
2. Confirm trailer brakes engage when the breakaway pin is pulled
3. Walk all exterior lights with a second person confirming function
4. Check tire pressure and inspect sidewalls on all trailer tires
5. Inspect all floor boards or rubber mats for damage or gaps
6. Confirm hitch is rated for gross trailer weight and safety chains are crossed
7. Check all interior surfaces for sharp metal edges or protruding hardware
8. Verify ventilation panels are open and functional for the weather conditions

Pennsylvania takes livestock transport seriously, and the state’s enforcement infrastructure — from PennDOT weight stations to Pennsylvania State Police Motor Carrier Enforcement — means non-compliance is consistently detected. Staying current on the rules protects your animals, your operation, and your ability to keep hauling. For more on how Pennsylvania regulates animals on and around your property, explore our guides on dog leash laws in Pennsylvania, kennel zoning laws in Pennsylvania, and beekeeping laws in Pennsylvania.