Public Act 104-0436
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| Public Act 104-0436 | ||||
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AN ACT concerning transportation. | ||||
Be it enacted by the People of the State of Illinois, | ||||
represented in the General Assembly: | ||||
Section 5. The Illinois Vehicle Code is amended by | ||||
changing Section 15-111 as follows: | ||||
(625 ILCS 5/15-111) (from Ch. 95 1/2, par. 15-111) | ||||
Sec. 15-111. Wheel and axle loads and gross weights. | ||||
(a) No vehicle or combination of vehicles with pneumatic | ||||
tires may be operated, unladen or with load, when the total | ||||
weight on the road surface exceeds the following: 20,000 | ||||
pounds on a single axle; 34,000 pounds on a tandem axle with no | ||||
axle within the tandem exceeding 20,000 pounds; 80,000 pounds | ||||
gross weight for vehicle combinations of 5 or more axles; or a | ||||
total weight on a group of 2 or more consecutive axles in | ||||
excess of that weight produced by the application of the | ||||
following formula: W = 500 times the sum of (LN divided by N-1) | ||||
+ 12N + 36, where "W" equals overall total weight on any group | ||||
of 2 or more consecutive axles to the nearest 500 pounds, "L" | ||||
equals the distance measured to the nearest foot between | ||||
extremes of any group of 2 or more consecutive axles, and "N" | ||||
equals the number of axles in the group under consideration. | ||||
The above formula when expressed in tabular form results | ||||
in allowable loads as follows: | ||||
Distance measured
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to the nearest
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foot between the
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extremes of any Maximum weight in pounds
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group of 2 or of any group of
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more consecutive 2 or more consecutive axles
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axles | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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*If the distance between 2 axles is 96 inches or less, the 2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
axles are tandem axles and the maximum total weight may not | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
exceed 34,000 pounds, notwithstanding the higher limit | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
resulting from the application of the formula. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
**Two consecutive sets of tandem axles may carry 34,000 pounds | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
each if the overall distance between the first and last axles | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
of these tandems is 36 feet or more. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Vehicles not in a combination having more than 4 axles may | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
not exceed the weight in the table in this subsection (a) for 4 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
axles measured between the extreme axles of the vehicle. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Vehicles in a combination having more than 6 axles may not | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
exceed the weight in the table in this subsection (a) for 6 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
axles measured between the extreme axles of the combination. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Local authorities, with respect to streets and highways | ||
under their jurisdiction, without additional fees, may also by | ||
ordinance or resolution allow the weight limitations of this | ||
subsection, provided the maximum gross weight on any one axle | ||
shall not exceed 20,000 pounds and the maximum total weight on | ||
any tandem axle shall not exceed 34,000 pounds, on designated | ||
highways when appropriate regulatory signs giving notice are | ||
erected upon the street or highway or portion of any street or | ||
highway affected by the ordinance or resolution. | ||
The following are exceptions to the above formula: | ||
(1) Vehicles for which a different limit is | ||
established and posted in accordance with Section 15-316 | ||
of this Code. | ||
(2) Vehicles for which the Department of | ||
Transportation and local authorities issue overweight | ||
permits under authority of Section 15-301 of this Code. | ||
These vehicles are not subject to the bridge formula. | ||
(3) Cities having a population of more than 50,000 may | ||
permit by ordinance axle loads on 2-axle motor vehicles 33 | ||
1/2% above those provided for herein, but the increase | ||
shall not become effective until the city has officially | ||
notified the Department of the passage of the ordinance | ||
and shall not apply to those vehicles when outside of the | ||
limits of the city, nor shall the gross weight of any | ||
2-axle motor vehicle operating over any street of the city | ||
exceed 40,000 pounds. | ||
(4) Weight limitations shall not apply to vehicles | ||
(including loads) operated by a public utility when | ||
transporting equipment required for emergency repair of | ||
public utility facilities or properties or water wells. | ||
(4.5) A 3-axle or 4-axle vehicle (including when | ||
laden) operated or hired by a municipality within Cook, | ||
Lake, McHenry, Kane, DuPage, or Will county being operated | ||
for the purpose of performing emergency sewer repair that | ||
would be subject to a weight limitation less than 66,000 | ||
pounds under the formula in this subsection (a) shall have | ||
a weight limitation of 66,000 pounds or the vehicle's | ||
gross vehicle weight rating, whichever is less. This | ||
paragraph (4.5) does not apply to vehicles being operated | ||
on the National System of Interstate and Defense Highways, | ||
or to vehicles being operated on bridges or other elevated | ||
structures constituting a part of a highway. | ||
(5) Two consecutive sets of tandem axles may carry a | ||
total weight of 34,000 pounds each if the overall distance | ||
between the first and last axles of the consecutive sets | ||
of tandem axles is 36 feet or more, notwithstanding the | ||
lower limit resulting from the application of the above | ||
formula. | ||
(6) A truck, not in combination and used exclusively | ||
for the collection of rendering materials, may, when | ||
laden, transmit upon the road surface, except when on part | ||
of the National System of Interstate and Defense Highways, | ||
the following maximum weights: 22,000 pounds on a single | ||
axle; 40,000 pounds on a tandem axle. | ||
(7) A truck not in combination, equipped with a self | ||
compactor or an industrial roll-off hoist and roll-off | ||
container, used exclusively for garbage, refuse, or | ||
recycling operations, may, when laden, transmit upon the | ||
road surface, except when on part of the National System | ||
of Interstate and Defense Highways, the following maximum | ||
weights: 22,000 pounds on a single axle; 40,000 pounds on | ||
a tandem axle; 40,000 pounds gross weight on a 2-axle | ||
vehicle; 54,000 pounds gross weight on a 3-axle vehicle. | ||
This vehicle is not subject to the bridge formula. | ||
(7.5) A 3-axle rear discharge truck mixer registered | ||
as a Special Hauling Vehicle, used exclusively for the | ||
mixing and transportation of concrete in the plastic | ||
state, may, when laden, transmit upon the road surface, | ||
except when on part of the National System of Interstate | ||
and Defense Highways, the following maximum weights: | ||
22,000 pounds on single axle; 40,000 pounds on a tandem | ||
axle; 54,000 pounds gross weight on a 3-axle vehicle. This | ||
vehicle is not subject to the bridge formula. | ||
(8) Except as provided in paragraph (7.5) of this | ||
subsection (a), tandem axles on a 3-axle truck registered | ||
as a Special Hauling Vehicle, manufactured prior to or in | ||
the model year of 2024 and first registered in Illinois | ||
prior to January 1, 2025, with a distance greater than 72 | ||
inches but not more than 96 inches between any series of 2 | ||
axles, is allowed a combined weight on the series not to | ||
exceed 36,000 pounds and neither axle of the series may | ||
exceed 20,000 pounds. Any vehicle of this type | ||
manufactured after the model year of 2024 or first | ||
registered in Illinois after December 31, 2024 may not | ||
exceed a combined weight of 34,000 pounds through the | ||
series of 2 axles and neither axle of the series may exceed | ||
20,000 pounds. | ||
A 3-axle combination sewer cleaning jetting vacuum | ||
truck registered as a Special Hauling Vehicle, used | ||
exclusively for the transportation of non-hazardous solid | ||
waste, manufactured before or in the model year of 2014, | ||
first registered in Illinois before January 1, 2015, may, | ||
when laden, transmit upon the road surface, except when on | ||
part of the National System of Interstate and Defense | ||
Highways, the following maximum weights: 22,000 pounds on | ||
a single axle; 40,000 pounds on a tandem axle; 54,000 | ||
pounds gross weight on a 3-axle vehicle. This vehicle is | ||
not subject to the bridge formula. | ||
(9) A 4-axle truck mixer registered as a Special | ||
Hauling Vehicle, used exclusively for the mixing and | ||
transportation of concrete in the plastic state, and not | ||
operated on a highway that is part of the National System | ||
of Interstate Highways, is allowed the following maximum | ||
weights: 20,000 pounds on any single axle; 36,000 pounds | ||
on a series of axles greater than 72 inches but not more | ||
than 96 inches; and 34,000 pounds on any series of 2 axles | ||
greater than 40 inches but not more than 72 inches. The | ||
gross weight of this vehicle may not exceed the weights | ||
allowed by the bridge formula for 4 axles. The bridge | ||
formula does not apply to any series of 3 axles while the | ||
vehicle is transporting concrete in the plastic state, but | ||
no axle or tandem axle of the series may exceed the maximum | ||
weight permitted under this paragraph (9) of subsection | ||
(a). | ||
(10) Combinations of vehicles, registered as Special | ||
Hauling Vehicles that include a semitrailer manufactured | ||
prior to or in the model year of 2024, and registered in | ||
Illinois prior to January 1, 2025, having 5 axles with a | ||
distance of 42 feet or less between extreme axles, may not | ||
exceed the following maximum weights: 20,000 pounds on a | ||
single axle; 34,000 pounds on a tandem axle; and 72,000 | ||
pounds gross weight. This combination of vehicles is not | ||
subject to the bridge formula. For all those combinations | ||
of vehicles that include a semitrailer manufactured after | ||
the effective date of P.A. 92-0417, the overall distance | ||
between the first and last axles of the 2 sets of tandems | ||
must be 18 feet 6 inches or more. Any combination of | ||
vehicles that has had its cargo container replaced in its | ||
entirety after December 31, 2024 may not exceed the | ||
weights allowed by the bridge formula. | ||
(11) The maximum weight allowed on a vehicle with | ||
crawler type tracks is 40,000 pounds. | ||
(12) A combination of vehicles, including a tow truck | ||
and a disabled vehicle or disabled combination of | ||
vehicles, that exceeds the weight restriction imposed by | ||
this Code, may be operated on a public highway in this | ||
State provided that neither the disabled vehicle nor any | ||
vehicle being towed nor the tow truck itself shall exceed | ||
the weight limitations permitted under this Chapter. | ||
During the towing operation, neither the tow truck nor the | ||
vehicle combination shall exceed 24,000 pounds on a single | ||
rear axle and 44,000 pounds on a tandem rear axle, | ||
provided the towing vehicle: | ||
(i) is specifically designed as a tow truck having | ||
a gross vehicle weight rating of at least 18,000 | ||
pounds and is equipped with air brakes, provided that | ||
air brakes are required only if the towing vehicle is | ||
towing a vehicle, semitrailer, or tractor-trailer | ||
combination that is equipped with air brakes; | ||
(ii) is equipped with flashing, rotating, or | ||
oscillating amber lights, visible for at least 500 | ||
feet in all directions; | ||
(iii) is capable of utilizing the lighting and | ||
braking systems of the disabled vehicle or combination | ||
of vehicles; and | ||
(iv) does not engage in a tow exceeding 20 miles | ||
from the initial point of wreck or disablement. Any | ||
additional movement of the vehicles may occur only | ||
upon issuance of authorization for that movement under | ||
the provisions of Sections 15-301 through 15-318 of | ||
this Code. The towing vehicle, however, may tow any | ||
disabled vehicle to a point where repairs are actually | ||
to occur. This movement shall be valid only on State | ||
routes. The tower must abide by posted bridge weight | ||
limits. | ||
(12.5) The vehicle weight limitations in this Section | ||
do not apply to a covered heavy duty tow and recovery | ||
vehicle. The covered heavy duty tow and recovery vehicle | ||
license plate must cover the operating empty weight of the | ||
covered heavy duty tow and recovery vehicle only. | ||
(13) Upon and during a declaration of an emergency | ||
propane supply disaster by the Governor under Section 7 of | ||
the Illinois Emergency Management Agency Act: | ||
(i) a truck not in combination, equipped with a | ||
cargo tank, used exclusively for the transportation of | ||
propane or liquefied petroleum gas may, when laden, | ||
transmit upon the road surface, except when on part of | ||
the National System of Interstate and Defense | ||
Highways, the following maximum weights: 22,000 pounds | ||
on a single axle; 40,000 pounds on a tandem axle; | ||
40,000 pounds gross weight on a 2-axle vehicle; 54,000 | ||
pounds gross weight on a 3-axle vehicle; and | ||
(ii) a truck when in combination with a trailer | ||
equipped with a cargo tank used exclusively for the | ||
transportation of propane or liquefied petroleum gas | ||
may, when laden, transmit upon the road surface, | ||
except when on part of the National System of | ||
Interstate and Defense Highways, the following maximum | ||
weights: 22,000 pounds on a single axle; 40,000 pounds | ||
on a tandem axle; 90,000 pounds gross weight on a | ||
5-axle or 6-axle vehicle. | ||
Vehicles operating under this paragraph (13) are not | ||
subject to the bridge formula. | ||
(14) A vehicle or combination of vehicles that uses | ||
either natural gas or propane gas as a motor fuel or is | ||
operated by an engine fueled wholly or partially by an | ||
electric battery or hydrogen fuel cell electric fueling | ||
system may exceed the above weight limitations by up to | ||
2,000 pounds, the total allowance is calculated by an | ||
amount that is equal to the difference between the weight | ||
of the vehicle attributable to the natural gas or propane | ||
or hydrogen gas tank, batteries, and fueling system | ||
carried by the vehicle, and the weight of a comparable | ||
diesel tank and fueling system. This paragraph (14) shall | ||
not allow a vehicle to exceed any posted weight limit on a | ||
highway or structure. | ||
(15) An emergency vehicle or fire apparatus that is a | ||
vehicle designed to be used under emergency conditions to | ||
transport personnel and equipment, and used to support the | ||
suppression of fires and mitigation of other hazardous | ||
situations on a Class I highway, may not exceed 86,000 | ||
pounds gross weight, or any of the following weight | ||
allowances: | ||
(i) 24,000 pounds on a single steering axle; | ||
(ii) 33,500 pounds on a single drive axle; | ||
(iii) 62,000 pounds on a tandem axle; or | ||
(iv) 52,000 pounds on a tandem rear drive steer | ||
axle. | ||
(16) A bus, motor coach, or recreational vehicle may | ||
carry a total weight of 24,000 pounds on a single axle, but | ||
may not exceed other weight provisions of this Section. | ||
Gross weight limits shall not apply to the combination of | ||
the tow truck and vehicles being towed. The tow truck license | ||
plate must cover the operating empty weight of the tow truck | ||
only. The weight of each vehicle being towed shall be covered | ||
by a valid license plate issued to the owner or operator of the | ||
vehicle being towed and displayed on that vehicle. If no valid | ||
plate issued to the owner or operator of that vehicle is | ||
displayed on that vehicle, or the plate displayed on that | ||
vehicle does not cover the weight of the vehicle, the weight of | ||
the vehicle shall be covered by the third tow truck plate | ||
issued to the owner or operator of the tow truck and | ||
temporarily affixed to the vehicle being towed. If a roll-back | ||
carrier is registered and being used as a tow truck, however, | ||
the license plate or plates for the tow truck must cover the | ||
gross vehicle weight, including any load carried on the bed of | ||
the roll-back carrier. | ||
The Department may by rule or regulation prescribe | ||
additional requirements. However, nothing in this Code shall | ||
prohibit a tow truck under instructions of a police officer | ||
from legally clearing a disabled vehicle, that may be in | ||
violation of weight limitations of this Chapter, from the | ||
roadway to the berm or shoulder of the highway. If in the | ||
opinion of the police officer that location is unsafe, the | ||
officer is authorized to have the disabled vehicle towed to | ||
the nearest place of safety. | ||
For the purpose of this subsection, gross vehicle weight | ||
rating, or GVWR, means the value specified by the manufacturer | ||
as the loaded weight of the tow truck. | ||
(b) As used in this Section, "recycling haul" or | ||
"recycling operation" means the hauling of non-hazardous, | ||
non-special, non-putrescible materials, such as paper, glass, | ||
cans, or plastic, for subsequent use in the secondary | ||
materials market. | ||
(c) No vehicle or combination of vehicles equipped with | ||
pneumatic tires shall be operated, unladen or with load, upon | ||
the highways of this State in violation of the provisions of | ||
any permit issued under the provisions of Sections 15-301 | ||
through 15-318 of this Chapter. | ||
(d) No vehicle or combination of vehicles equipped with | ||
other than pneumatic tires may be operated, unladen or with | ||
load, upon the highways of this State when the gross weight on | ||
the road surface through any wheel exceeds 800 pounds per inch | ||
width of tire tread or when the gross weight on the road | ||
surface through any axle exceeds 16,000 pounds. | ||
(e) No person shall operate a vehicle or combination of | ||
vehicles over a bridge or other elevated structure | ||
constituting part of a highway with a gross weight that is | ||
greater than the maximum weight permitted by the Department, | ||
when the structure is sign posted as provided in this Section. | ||
(f) The Department upon request from any local authority | ||
shall, or upon its own initiative may, conduct an | ||
investigation of any bridge or other elevated structure | ||
constituting a part of a highway, and if it finds that the | ||
structure cannot with safety to itself withstand the weight of | ||
vehicles otherwise permissible under this Code the Department | ||
shall determine and declare the maximum weight of vehicles | ||
that the structures can withstand, and shall cause or permit | ||
suitable signs stating maximum weight to be erected and | ||
maintained before each end of the structure. No person shall | ||
operate a vehicle or combination of vehicles over any | ||
structure with a gross weight that is greater than the posted | ||
maximum weight. | ||
(g) Upon the trial of any person charged with a violation | ||
of subsection (e) or (f) of this Section, proof of the | ||
determination of the maximum allowable weight by the | ||
Department and the existence of the signs, constitutes | ||
conclusive evidence of the maximum weight that can be | ||
maintained with safety to the bridge or structure. | ||
(Source: P.A. 102-124, eff. 7-23-21.) | ||
Effective Date: 6/1/2026
