Over-Weight permits are allowed on farm plates only for Reducible Loads.

A reducible load is a load that can be reduced to legal size or weight, or that is practically divided in a way that does not diminish value or inhibit its intended purpose. Example would include a hauler moving potatoes.

To obtain an overweight permit for your farm plated vehicle contact MassDOT at 781-431-5148 or visit them at 668 South Ave, Weston MA.

*If you are applying for a permit on a farm plated vehicle you will need a copy of your Section 6 FAN Decal Compliance Form that lists all the vehicles, VIN numbers and Title numbers. The overweight permit vehicle specific and will list the VIN on the permit, the permit needs to be with the vehicle at all times.

When a Permit for an Overweight Reducible Load is Required
A permit is required to carry any load which together with the vehicle is in excess of the weight allowed by M.G.L. c. 90, § 19 or 19A and M.G.L. c. 85, §§ 30 and 30A.

In general, a permit is required in the following instances:

(1) A permit is required to travel on state highways or ways determined by the Department to be a through route for any motor vehicle having two axles which vehicle together with its load weighs more than 46,000 pounds, or for any motor vehicle, trailer, semi trailer, or semi trailer unit having three or more axles which together with its load weighs more than 80,000 pounds.

(2) In addition, notwithstanding anything provided in 700 CMR 8.04(1) and (2), a permit is required for any motor vehicle, trailer, semi trailer or semi trailer unit which has a weight on any axle, measured on the ground, of more than 22,400 pounds, or if the axles are spaced less than six feet apart, more than 18,000 pounds.

(3) In addition, notwithstanding any thing provided in 700 CMR 8.04(1) and (2), a permit is required for any motor vehicle, trailer, semi trailer and semi trailer unit where the overall gross weight on a group of two or more consecutive axles exceeds the gross weight (W) produced by computing the formula:

Bridge Formula with Example

(W = overall gross weight on any group of two or more consecutive axles to the nearest 500 pounds, L = distance in feet between the extreme of any group of two or more consecutive axles, and N = number of axles in group under consideration, except that two consecutive sets of tandem axles may carry a gross load of 34,000 pounds each providing the overall distance between the first and last axles of such consecutive sets of tandem axles is 36 feet or more).

(4) Notwithstanding 700 CMR 8.04(1) through (3), the following vehicles may travel on a way while engaging in hauling construction materials, liquid petroleum products or bulk feed without a permit, provided that the gross vehicle weight at which they operate complies with the weight restrictions contained in M.G.L. c. 90, § 17A, does not exceed the gross vehicle weight rating established by the original manufacturer of the chassis and does not exceed the weight for which the vehicle is duly registered in the Commonwealth of Massachusetts:

(a) a construction type motor vehicle with two axles;
(b) a motor vehicle carrying bulk feed;
(c) a construction type semi-trailer or tandem unit or motor vehicle having three axles carrying construction materials;
(d) a semi-trailer unit or motor vehicle having three axles carrying liquid petroleum products;
(e) a motor vehicle having three axles and designed and used for hauling refuse.

Permits will be issued on an annual basis unless otherwise indicated on the permit, but the Department specifically reserves the right to revoke any permit or class of permits, notwithstanding any expiration date contained on the permit to the contrary, when in its judgment and discretion public safety or sound engineering judgment warrant.