TITLE 92: TRANSPORTATION
CHAPTER I: DEPARTMENT OF TRANSPORTATION
SUBCHAPTER f: HIGHWAYS
OVERSIZE AND OVERWEIGHT PERMIT MOVEMENTS ON STATE HIGHWAYS
SUBPART F: OVERWEIGHT VEHICLES AND LOADS
a) Permits may be issued for overweight vehicles and objects if
they have been reasonably disassembled [625 ILCS 5/15-301] and the
highway system can carry the weight. Overweight moves may consist of only a
single object. Overweight equipment may be moved with normal components
b) The Permit Office may require verification of the weight of the
vehicle and load prior to issuing a permit when there is reason to believe
the requested weight is incorrect. Permits are required for any overweight
movement to or from a weigh scale over State highways for preliminary
weighing of the vehicle and load.
Section 554.602 Legal Weights
See Form BT 753 and
Section 15-111 of The Illinois Size and Weight Law.
Exceptions to Legal Weights
Fire apparatus or
equipment designed for snow and ice removal owned or operated by
governmental agencies, implements of husbandry temporarily operated or towed
upon a highway, and vehicles and loads operated by a public utility when
transporting equipment required for emergency repairs are exempt from weight
Practical Maximum Weights
All requests for
overweight moves are considered. However, due to the physical capacity of
the highways and bridges, practical maximum weights have been established.
Although many bridges will not carry these weights, routes are generally
available to most destinations. These weights are:
a) 6-axle tractor semitrailer combination 120,000 pounds gross;
48,000 pounds on drive tandem; 60,000 pounds on semitrailer 3-axle tandem.
b) 5-axle tractor semitrailer combination 100,000 pounds gross;
maximum of 48,000 pounds on either tandem.
c) 4-or-more-axle vehicle (axle spacing 23 feet or more): up to and
including 76,000 pounds gross; maximum of 34,000 pounds on one tandem and
44,000 pounds on the other.
d) 3-or-more-axle vehicle (axle spacing 18 feet or more): maximum
68,000 pounds gross; 20,000 pounds on one axle and 48,000 pounds on the
e) 2-axle vehicle: maximum 48,000 pounds, neither axle exceeds
Section 554.605 Superload Moves
Superload moves or moves
on nonstandard vehicles or with nonstandard axle configurations may be
authorized if allowable pavement and bridge stresses are not exceeded.
These moves normally require additional time for analyses.
Maximum Weight on Chicago Expressways
The maximum gross weight
that may be authorized on Chicago expressway is 88,000 pounds on five and
six-axle tractor-semitrailer combinations, 72,000 pounds on four-axle
vehicles and 60,000 pounds on three-axle vehicles.
Movement to a Designated Scale
Sections 15-301(b) and (f)
of the Illinois Size and Weight Law allow the permittee to travel to a
certified scale to verify the axle and gross weights of an overweight load
when the permittee is uncertain of the correct weights. The following
a) The permittee must, on his original application, request that he
be routed to a certified scale, the location of which he has designated on
b) For superloads, the scale must be the nearest scale to the
permittee's origin that has been certified by the Illinois Department of
Agriculture (State weigh stations included). "Nearest scale" for routine
permit loads is defined as a scale within 25 miles of the permitted load's
origin. The scale must be certified by the Illinois Department of
Agriculture (State weigh stations included). However, if size and/or weight
limits preclude the use of the requested scale, the permittee shall be
routed to the first scale located within the route assigned by the Permit
Office provided such scale is located within 25 miles of the permittee's
origin or no more than ⅓ of the total distance of the permitted route,
whichever distance is less.
c) The permittee must indicate the requested routing.
d) If any routes under the jurisdiction of local agencies are
included in the routing, the permittee must provide evidence that he has
secured approval from the local authority having jurisdiction.
e) Due to the volume of permits handled, the Permit Office cannot
assist the permittee in determining the closest certified scale. By
approving the routing to the scale as requested by the applicant and
indicating the weight of the load is to be checked at a designated scale,
the Permit Office in no way implies that it is the closest certified scale
to the permittee's origin. If a police officer finds there is a closer
certified scale, he may require the driver to travel to that scale; however,
it is that officer's responsibility to verify the routes can accommodate the
Section 554.608 Status
of Permittee While Enroute to the Scale
a) When the permittee has requested travel to a designated scale and
the routing and scale have been specified in the permit by the Permit Office
the permittee shall be deemed in compliance with the weight provisions of
the permit provided the axle or gross weights do not exceed any of the
permitted limits by more than the following amounts:
1) Single axle 2,000 pounds
2) Tandem axle 3,000 pounds
3) Gross 5,000 pounds
b) If the permittee is stopped by a police officer while enroute to
the scale specified in the permit, the police officer may accompany the
permittee to the designated scale and witness the weighing, or the officer
may direct the permittee to a closer certified scale. However, the officer
assumes responsibility for ensuring the route he selects to the alternate
scale can safely accommodate the load. The officer may contact the Permit
Office if he is unsure of the capacity of the route.
c) If after checking the weights at the scale, the permittee finds
the weights are within the limits indicated on the permit, he may proceed to
his destination by the routes indicated in the permit. However, the
permittee must still stop at all open weigh stations along his route and is
subject to all normal enforcement action.
d) If the permittee finds the load exceeds one or more of the limits
specified in the permit, but is within the tolerances indicated in
subsection (a), he must contact the Permit Office and either obtain a
revised permit as provided in Section 554.211 of this Part, or reduce his
weights to those specified in his permit before proceeding. Under the
provisions of Section 15-301(f) of the Illinois Size and Weight Law, he is
not subject to arrest for being overweight while at or enroute to the
designated scale unless he is found to be in excess of his permit limits by
more than the weight tolerance in subsection (a).
e) If the load exceeds one or more of the limits specified in the
permit by an amount in excess of the tolerances indicated in subsection (a),
the permittee is subject to arrest if a police officer witnesses the
weighing or if the permittee moves the load from the scale premises without
either first adjusting the load to within the limits specified in the permit
or obtaining a new permit that covers the movement. There shall be no
refund of fees for any permit so exceeded, nor will there be any reduction
in the fee for the new permit.
Movement of Off-Road Overweight Equipment
The distance that can be
traveled on Illinois highways under a permit by overweight equipment such as
a scraper or end loader that is not designed for highway travel, under its
own power or towed, will generally be limited to a maximum distance of 25
miles. Axle limitations will be based upon an analysis of the pavement
utilizing the tire sizes specified on the application. If any single axle
exceeds 30,000 pounds, no structures may be crossed.
Section 554.610 Movement
of Exceptionally Large Equipment
characteristically involve a great deal of advance planning and analysis. The
objects being moved may weigh several hundred thousand pounds or more and can be
moved under their own power or may be loaded on special transporting equipment.
Typical loads include power shovels or draglines used in strip mining
operations, reactor vessels or generators used in power plants, or other
extremely heavy industrial equipment components. These movements are generally
for very short distances on or across a highway. In addition to the general
provisions applicable to normal overdimension and overweight movements, one or
more of the following conditions may apply.
a) Due to the lengthy pavement and bridge analyses required for
exceptionally heavy loads, a special agreement regarding payment of inspection
and investigation fees in accordance with Section 554.910(b) may be necessary.
b) The effect of the movement on overhead and underground utilities must
be determined by the utility companies. Any adjustments required, such as
raising lines or rerouting underground facilities are to be made in advance of
c) Movement may be restricted to when the shoulders are dry and firm,
frozen, or have bearing capacity to support the object being moved or the weight
of other passing traffic. /p>
d) Movement may be restricted to periods when the probability of
precipitation is no more than 30 percent as predicted by the National Weather
e) An earthen or crushed stone pad of a depth specified by the Permit
Office may be required to protect the pavement.
f) Additional insurance or security may be required in accordance with
Sections 554.108 or 554.905.
g) A special agreement between the permittee and the Department may be
required to ensure all conditions are defined regarding the security and repair
requirements as specified in Section 554.910b.