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APPENDIX C
Regulations on Vehicle Size and Weight
In the United States, federal law governs the weight of vehicles (k) Any over-the-road bus, or any vehicle which is regularly and
traveling on the Interstate System and vehicle width and length exclusively used as an intrastate public agency transit passenger
on the National Network, the Interstate System, and designated bus, is excluded from the axle weight limits in paragraphs (c)
federal-aid primary highways (C1). The states regulate vehicle through (e) of this section until October 1, 2009. Any State that
height on all highways in the state, and the weight limits on all has enforced, in the period beginning October 6, 1992, and end-
highways not included in the National Network. In Canada, the ing November 30, 2005, a single axle weight limitation of
provinces regulate height and weight limits on roads. 20,000 pounds or greater but less than 24,000 pounds may not
enforce a single axle weight limit on these vehicles of less than
24,000 lbs. (Effective as of March 22, 2007.)
FEDERAL REGULATIONS ON VEHICLE SIZE
AND WEIGHT
STATE REGULATIONS ON MOTOR BUS SIZE
The specifics of these regulations are found in the Code of Fed-
eral Regulations (CFR) Part 658: Truck Size and Weight, Route Two sources for the following information were used. One is the
Designations--Length, Width, and Weight Limitations (C2). Rand McNally Motor Carriers' Road Atlas `07 (C3), and the
The applicable sections of CFR Part 658 are excerpted here. second was the motor vehicle codes and regulations that were
available from the websites of the 50 states and the District of
§658.13 Length. Columbia. The motor carrier height limits by state are given in
Table C1. The height exceptions that were found for motor
(d) No State shall impose a limit of less than 45 feet on the length
buses are given in brackets.
of any bus on the National Network.
The maximum motor bus lengths allowed by states on high-
§658.15 Width.
ways controlled by the state are given in Table C2. Motor buses
of at least 45 ft must be allowed to operate on the National Net-
(a) No State shall impose a width limitation of more or less than
work by federal regulations. Limits in brackets are for straight
102 inches, or its approximate metric equivalent, 2.6 meters
truck, and motor bus limits may differ.
(102.36 inches) on a vehicle operating on the National Network,
except for the State of Hawaii, which is allowed to keep the
There are seven states that have a smaller width than the fed-
State's 108-inch width maximum by virtue of section 416(a) of
eral National Network width of 102 inches. The maximum
the STAA.
widths for motor buses by state are given in Table C3. Where the
width limit for motor buses was not found, the limits for straight
§658.17 Weight.
trucks are given in brackets.
(a) The provisions of the section are applicable to the National
System of Interstate and Defense Highways and reasonable ac-
cess thereto. PROVINCIAL REGULATIONS
ON MOTOR CARRIER SIZE
(b) The maximum gross vehicle weight shall be 80,000 pounds
except where lower gross vehicle weight is dictated by the The information presented below was obtained from Reference
bridge formula. 17 for commercial carriers, and there may be exceptions for
motor buses. Information is given only for the southern
(c) The maximum gross weight upon any one axle, including provinces. The size limits are given in Table C4.
any one axle of a group of axles, or a vehicle is 20,000 pounds.
(d) The maximum gross weight on tandem axles is 34,000 REFERENCES
pounds.
C1. Title 23 USC, 127, Federal Statute on Interstate Vehicle
(e) No vehicle or combination of vehicles shall be moved or op- Weight.
erated on any Interstate highway when the gross weight on two C2. 23 CFR Part 658, Code of Federal Regulations, Federal
or more consecutive axles exceeds the limitations prescribed by Size Regulations for Commercial Motor Vehicles.
the following formula, referred to as the Bridge Gross Weight C3. Motor Carriers' Road Atlas `07, Rand McNally & Com-
Formula: pany, Skokie, Ill., 2007.
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71
TABLE C1
MAXIMUM MOTOR CARRIER [BUS EXCEPTIONS] HEIGHT LIMITATIONS
BY STATES
Height Height Height
State (in feet) State (in feet) State (in feet)
Alabama 13.5 Kentucky 13.5 North Dakota 14
Alaska 14 Louisiana 13.5 Ohio 13.5
Arizona 14a Maine 13.5 Oklahoma 13.5
Arkansas 13.5 Maryland 13.5 Oregon 14
California [14.25] Massachusetts 13.5 Pennsylvania [14.5]e
Colorado [14.5]b Michigan 13.5 Rhode Island 13.5
Connecticut 13.5c Minnesota [14]d South Carolina 13.5
Delaware 13.5 Mississippi 13.5 South Dakota 14
District of 13.5 Missouri 13.6 Tennessee 13.5
Columbia
Florida 13.5 Montana 14 Texas 14
Georgia 13.5 Nebraska 14.5 Utah 14
Hawaii 14 Nevada 14 Vermont 13.5
Idaho 14 New Hampshire 13.5 Virginia 13.5
Illinois 13.5 New Jersey 13.5 Washington 14
Indiana 13.5 New Mexico 14 West Virginia 13.5
Iowa 13.5 New York 13.5 Wisconsin [14.5]f
Kansas 14 North Carolina 13.5 Wyoming 14
a
With permit, otherwise 13.5 ft.
b
On designated highways, otherwise 13.5 ft.
c
Commissioner of Transportation can grant permit for greater height.
d
For double-deck bus, otherwise 13.5 ft.
e
Bus exception.
f
With approval for double-deck buses, speeds limited to 45 mph.
TABLE C2
MAXIMUM MOTOR CARRIER [BUS EXCEPTIONS] LENGTH LIMITS ON STATE
HIGHWAY SYSTEMS
Length Length Length
State (in feet) State (in feet) State (in feet)
Alabama 40 Kentucky 45 North Dakota [60]
Alaska [65]** Louisiana 45 Ohio [60]*
Arizona [65]* Maine 45 Oklahoma 45
Arkansas 40 Maryland [60]b Oregon 40c
California [60] Massachusetts [60]* Pennsylvania [60]*
Colorado [60]a Michigan [65]* Rhode Island 40d
Connecticut 45 Minnesota [61]* South Carolina 45e
Delaware 45 Mississippi 40 South Dakota [45]
Dist. of Columbia 40# Missouri 45 Tennessee 45f
Florida [50]# Montana 55 Texas 45#
Georgia [ND] Nebraska 40 Utah 45g
Hawaii [65] Nevada [65]* Vermont 46
Idaho 45 New Hampshire 45 Virginia 40h
Illinois [60]* New Jersey 40 Washington [61]***
Indiana [65] New Mexico 40 West Virginia 40
Iowa [61]* New York [62]* Wisconsin [65]*
Kansas 45 North Carolina 40 Wyoming 60
*Articulated bus, other buses 45 ft.
**Articulated bus, other buses 50 ft.
***Articulated bus, other buses 46 ft.
#Articulated buses operate in state, exception not found.
a
Designated highways only.
b
For articulated buses, otherwise 45 ft on state primary system, otherwise 41 ft.
c
Size limits do not apply to mass transit district vehicles that are approved by road authority, 267.01-39.
d
Articulated buses are exempt from length limit, if owned by Rhode Island Transit Authority.
e
Bus lengths as approved by Department of Public Safety.
f
Bus length and weight exempt from limits for cities between 400,000 and 800,000 population.
g
Permit can be obtained for articulated buses.
h
Virginia Code 46.2-1147 permits articulated buses to be used, length was not specified.
[ND] = Length limit not designated.
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TABLE C3
MAXIMUM MOTOR CARRIER [BUS EXCEPTION] WIDTH LIMITS BY STATES
Width Width Width
State (inches) State (inches) State (inches)
Alabama 102 Kentucky 102 North Dakota 102
Alaska 102 Louisiana [102] Ohio [104]
Arizona 102 Maine 102 Oklahoma 102
Arkansas 102 Maryland 102c Oregon 102
California 102a Massachusetts 102 Pennsylvania 102
Colorado 102 Michigan 102 Rhode Island 102
Connecticut 102 Minnesota [108] South Carolina 102
Delaware 102 Mississippi 102 South Dakota 102
District of Columbia [102] Missouri 96c Tennessee 102
Florida 102b Montana 102 Texas 102
Georgia 102b Nebraska 102 Utah 102
Hawaii 108 Nevada 102 Vermont 102
Idaho 102 New Hampshire 102 Virginia 102
Illinois 102 New Jersey 96c Washington 102
Indiana 102 New Mexico 102 West Virginia 102
d
Iowa 102 New York Wisconsin 102
Kansas 102 North Carolina 102 Wyoming 102
a
Up to 104 with Public Utilities Commission permission.
b
On lanes less than 12 ft, 96 in.
c
On designated highways/routes, 102 in.
d
On designated truck access highways and on highways outside New York City with 10 ft or more lane widths, 102 in.;
elsewhere 96 in.
TABLE C4
CANADIAN PROVINCIAL SIZE LIMITS
FOR COMMERCIAL CARRIERS
Width Lengtha Height
Province (metersb) (metersb) (metersb)
Alberta 2.6 12.5 4.15
British Columbia 2.6 12.5 4.15
Manitoba 2.6 12.5 4.15
New Brunswick 2.6 12.5 4.15
Nova Scotia 2.6 12.5 4.15
Ontario 2.6 12.5 4.15
Québec 2.6 12.5 4.15
Saskatchewan 2.6 12.5 4.15
Source: Reference 41.
a
Length is for straight trucks.
b
Metric conversion: 2.6 m = 102.4 in.; 12.5 m = 41 ft;
4.15 m = 13.62 ft
