Size and Weight Limitations
Information on the size and weight limitations for farm trucks and truck tractors can be found in
Chapter 49 of the Pennsylvania Vehicle Code.
Width - A single vehicle may not
exceed a width of 8 feet, 6 inches. Any truck and truck tractor
combination may not exceed a width of 8 feet. There are several
exceptions applicable to farm vehicles:
- A vehicle carrying vegetable
crops or nutrients, which does not exceed a width of 12 feet can be
driven, hauled or towed between sunrise and sunset on highways other
- A vehicle used for crops or nutrients, which
does not exceed a width of 14 feet, 6 inches may be operated between
farms, on highways other than freeways between sunset and sunrise. When
used at this time, the vehicle shall have and operate at least one
flashing or revolving yellow light or strobe light, which shall be
mounted to provide visibility to vehicles approaching from any
direction, 360 degree visibility, regardless of the method of mounting,
and hazard signals.
Despite the above exceptions, all vehicles are still subject to width restrictions for particular roads or bridges.
Height - No vehicles, including farm trucks and truck tractors, may exceed 13 feet, 6 inches in height
Length - No individual motor vehicle,
including farm trucks and truck tractors, may exceed a length of 40
feet, including load and bumpers. There is no overall combination length
limitation - the length of combinations is controlled by the length of
the trailer. 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. The length of each
double trailer shall not exceed 28' feet. There is no exception for farm
Projecting Load Limitations - The load
on any individual vehicle or the front vehicle of a combination of
vehicles may not extend more than 3 feet beyond the front of the vehicle
and no more than 6 feet beyond the rear of the vehicle.
- If a load extends more than 4 feet
beyond the rear, a red flag or cloth no less than 12 inches square, or
if at night, a red light, must be attached to the projecting load.
loads are also limited to the length restrictions imposed on the entire
vehicle. Projecting load limitations are not applicable to vehicles
transporting live trees for planting or roof trusses.
Weight Limitations -
Every truck shall have its own registered gross weight based on the
gross vehicle weight rating assigned by the manufacturer (specified on
the federal weight certification label) and an equivalent weight rating
determined by PennDOT based on axle and wheel strength, horsepower,
braking power and other factors affecting the ability of the vehicle to
handle heavier loads.
No truck may be operated with a gross weight
in excess of its registered gross weight. No combination containing a
trailer having a gross weight or registered gross weight in excess of
10,000 pounds shall be operated with a gross weight in excess of the
registered gross weight of the truck or truck tractor for a combination.
gross weight maximum of any individual vehicle, including farm
vehicles, is 80,000 lbs. The gross weight maximum of any combination is
80,000 lbs. 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.
Oversize/overweight hauling permits may be issued for movement of
vehicles, which exceed the limitations on size, weight, and load as
established in the Pennsylvania Vehicle Code, Chapter 49. To check requirements for hauling permits, visit
PennDOT's website. For contact information in your respective area, select
Further information on hauling in excess of posted weight limits may be found in
Chapter 191 and
Chapter 193 of the PA Code.