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2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.28 - Certain vehicles to carry flares or other warning devices.

347.28
Certain vehicles to carry flares or other warning devices.
(1)
No person shall operate a motor truck or motor bus more than 80 inches in width or a truck tractor or road tractor on any highway outside the corporate limits of a city or village during hours of darkness unless such vehicle carries in a place readily accessible to the driver the following warning devices:
(a)
At least 3 pot torches or 3 red electric lanterns or 3 red emergency reflectors, each of which shall be capable of being seen and distinguished at a distance of at least 600 feet under normal atmospheric conditions during hours of darkness. If pot torches are carried in lieu of red electric lanterns, at least 3 red-burning fusees shall be carried in addition to such pot torches; and
(b)
At least 2 red-cloth flags, not less than 12 inches square, with standards to support such flags.
(2)
No person shall operate upon a highway outside the corporate limits of a city or village during hours of darkness any motor vehicle used for the transportation of explosives or any cargo tank truck used for the transportation of flammable liquids or compressed gases unless there is carried in such vehicle 3 red electric lanterns or 3 red emergency reflectors meeting the requirements of sub. (1). No pot torch or fusee or signal produced by flame shall be carried in any such vehicle. Such red emergency reflectors shall comply with the specifications for such reflectors as set forth in interstate commerce commission motor carrier safety regulations.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.30 - Penalty for violating lighting equipment requirements.

347.30
Penalty for violating lighting equipment requirements.
(1)
Any person violating s. 347.06 or 347.13 (2), (3) or (4) may be required to forfeit not less than $10 nor more than $20 for the first offense and not less than $25 nor more than $50 for the 2nd or subsequent conviction within a year.
(2)
Any person violating ss. 347.03, 347.07 to 347.12, 347.13 (1) or 347.14 to 347.29 may be required to forfeit not less than $10 nor more than $200.
(3)
Notwithstanding sub. (2), on or after April 5, 2018, and before 6 months after April 5, 2018, if a person violates s. 347.24 (2) by operating on a highway during hours of darkness a vehicle that is drawn by an animal and that is not equipped with 2 yellow or amber strobe lights visible from a distance of 500 feet to the rear and mounted not more than 6 inches from the lateral extremities of the vehicle, a law enforcement officer shall issue the person a warning notice and may not issue a citation.
History:  1971 c. 278; 2017 a. 228.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.36 - Performance ability of brakes.

347.36
Performance ability of brakes.
(1)
Brakes on motor vehicles and brakes on combinations of vehicles shall be capable of bringing the vehicle or combination of vehicles to a stop, under normal conditions, within 50 feet when traveling at a speed of 20 miles per hour.
(3)
All required brakes shall be maintained in good working order.
History:  1983 a. 243.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.37 - Brake fluid, sale regulation.

347.37
Brake fluid, sale regulation.
(1)
After January 1, 1960, no hydraulic brake fluid for use in motor vehicles shall be sold in this state if such brake fluid is below the minimum standard of specifications established by the society of automotive engineers for heavy duty type brake fluid No. 70R1 or a later designator for an improved product.
(2)
All manufacturers of brake fluids selling such fluids in Wisconsin shall state on the immediate containers in which such fluid is packaged that the fluid therein meets or exceeds the specifications under sub. (1).
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.38 - Horns and warning devices.

347.38
Horns and warning devices.
(1)
No person shall operate a motor vehicle upon a highway unless such motor vehicle is equipped with a horn in good working order and capable of emitting sound audible under normal conditions from a distance of not less than 200 feet, but no person shall at any time use a horn otherwise than as a reasonable warning or make any unnecessary or unreasonably loud or harsh sound by means of a horn or other warning device.
(2)
Except as otherwise provided in this section, no vehicle shall be equipped with nor shall any person use upon a vehicle any siren or compression or exhaust whistle.
(3)
Any vehicle may be equipped with a theft alarm signal device if such device is so arranged that it cannot be used by the driver as an ordinary warning signal.
(4)
An authorized emergency vehicle shall be equipped with a siren, but such siren shall not be used except when such vehicle is operated in response to an emergency call or in the immediate pursuit of an actual or suspected violator of the law, when responding to but not upon returning from a fire alarm, when transporting an organ for human transplantation, or when transporting medical personnel for the purpose of performing human organ harvesting or transplantation immediately after the transportation, in which events the driver of such vehicle shall sound the siren when reasonably necessary to warn pedestrians and other drivers.
History:  2007 a. 20.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.385 - Auxiliary lamps on emergency vehicles; traffic control signal emergency preemption devices.

347.385
Auxiliary lamps on emergency vehicles; traffic control signal emergency preemption devices.
(1m)
In this section:
(a)
“Authorized emergency vehicle" means an authorized emergency vehicle as defined in s. 340.01 (3) (a), (c), (g), or (i).
(b)
“Emergency preemption device" means a device, located on or within a traffic control signal, that is designed to receive an electronic, radio, light, or sound transmission from an approaching vehicle that alters the normal sequence of the traffic control signal to provide or maintain a green signal for the vehicle to proceed through the intersection.
(c)
“Transmitter" means a device that emits a signal for the purpose of activating an emergency preemption device.
(2m)
An authorized emergency vehicle may be equipped and operated with lamps designed and used, or with any other transmitter designed and used, to activate emergency preemption devices.
(3m)
The lamps authorized for use under this section may be any color and may be flashing, oscillating, rotating or pulsating.
(4)
No operator of an authorized emergency vehicle may use a transmitter, including lamps under sub. (2m), except when responding to an emergency call, when pursuing an actual or suspected violator of the law, or when responding to, but not when returning from, a fire alarm.
(5)
(a)
No person may operate upon a highway a motor vehicle, other than an authorized emergency vehicle, that is equipped with a transmitter or in which a transmitter is located. This subsection does not apply to a motor carrier or person in the business of selling transmitters to authorized users who transports a transmitter in original, unopened packaging or in an inoperative condition in an enclosed storage compartment of the vehicle.
(b)
No person may sell a transmitter except for use for authorized purposes as described in sub. (2m).
History:  2005 a. 193 ss. 1 to 6; Stats. 2005 s. 347.385.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.39 - Mufflers.

347.39
Mufflers.
(1)
No person shall operate on a highway any motor vehicle subject to registration unless such motor vehicle is equipped with an adequate muffler in constant operation and properly maintained to prevent any excessive or unusual noise or annoying smoke. This subsection also applies to motor bicycles.
(2)
No muffler or exhaust system on any vehicle mentioned in sub. (1) shall be equipped with a cutout, bypass or similar device nor shall there be installed in the exhaust system of any such vehicle any device to ignite exhaust gases so as to produce flame within or without the exhaust system. No person shall modify the exhaust system of any such motor vehicle in a manner which will amplify or increase the noise emitted by the motor of such vehicle above that emitted by the muffler originally installed on the vehicle, and such original muffler shall comply with all the requirements of this section.
(3)
In this section, “muffler" means a device consisting of a series of chambers of baffle plates or other mechanical design for receiving exhaust gases from an internal combustion engine and which is effective in reducing noise.
History:  1983 a. 243.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.40 - Mirrors.

347.40
Mirrors.
(1)
No person shall operate any motor vehicle upon a highway unless such vehicle is equipped with a mirror so located as to reflect to the operator a view of the roadway for a distance of 200 feet to the rear of such vehicle.
(2)
No person shall operate on a highway any school bus having a passenger-carrying capacity of 10 or more persons including the operator unless such bus is equipped with at least one mirror which is 7 inches in diameter so located as to enable the operator to see a reflection of the road from the entire front bumper forward to a point where direct observation is possible.
(3)
No person may operate or permit the operation of any motor bus on a highway unless the bus is equipped with 2 outside rearview mirrors, one to the right and one to the left of the operator. Each mirror shall have not less than 50 square inches of unobstructed reflective surface and shall be firmly supported and adjustable to give the operator a clear view past both the right and left rear of the bus.
History:  1975 c. 84; 1987 a. 235.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.41 - Speed indicators.

347.41
Speed indicators.
No person shall operate on a highway any motor vehicle primarily designed for use upon a highway unless such motor vehicle is equipped with a speedometer which with reasonable accuracy registers the speed of the vehicle, except that motor trucks or truck tractors may be equipped with tachometers or any other devices that indicate speed and motor vehicles transported pursuant and in compliance with s. 341.47 (1) (b) and (c) may be equipped with a governor of speed of a type which restricts speed and which is set at a level equal to or below the limits of 55 miles per hour in lieu of a speedometer.
History:  1983 a. 54.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.413 - Ignition interlock device tampering; failure to install.

347.413
Ignition interlock device tampering; failure to install.
(1)
No person may remove, disconnect, tamper with, or otherwise circumvent the operation of an ignition interlock device installed in response to the court order under s. 346.65 (6), 1999 stats., or s. 343.301 (1), 2007 stats., or s. 343.301 (1g), or fail to have the ignition interlock device installed as ordered by the court, or violate a court order under s. 343.301 (1g) restricting the person's operating privilege. This subsection does not apply to the removal of an ignition interlock device upon the expiration of the order requiring the motor vehicle to be so equipped or to necessary repairs to a malfunctioning ignition interlock device by a person authorized by the department.
(3)
The department shall design a warning label which shall be affixed to each ignition interlock device upon installation. The label shall provide notice of the penalties for tampering with or circumventing the operation of the ignition interlock device under sub. (1) and s. 343.10 (5) (a) 3.
History:  1991 a. 277; 1993 a. 213; 1999 a. 109; 2001 a. 16 ss. 3445f, 3445g, 4060hd, 4060hw, 4060hy; 2009 a. 100, 121; 2017 a. 124.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.415 - Odometer tampering.

347.415
Odometer tampering.
(1g)
In this section, “odometer" means an instrument for measuring and recording the actual distance that a motor vehicle, snowmobile, all-terrain vehicle, or utility terrain vehicle has traveled while in operation, but does not include any auxiliary instrument designed to be reset to zero to measure and record the actual distance that a motor vehicle, snowmobile, all-terrain vehicle, or utility terrain vehicle has traveled on trips.
(1m)
No person may, either personally or through an agent, remove, replace, disconnect, reset, tamper with, alter, or fail to connect the odometer of any motor vehicle, snowmobile, all-terrain vehicle, or utility terrain vehicle with the intent to change or affect the number of miles indicated thereon.
(2)
No person may operate a motor vehicle subject to registration under ch. 341 on any street or highway with knowledge that the odometer is removed, disconnected or nonfunctional. An exemption may be provided if parts are on back order to correct a nonfunctional odometer.
(3)
No person may advertise for sale, sell, use, install, or have installed any device which causes an odometer to register any mileage other than the true mileage driven. For purposes of this subsection, “true mileage driven" means that mileage traveled by the vehicle as measured and recorded by the odometer within the manufacturer's design tolerance.
(4)
No person shall conspire with any other person to violate sub. (1m), (2) or (3).
(5)
Nothing in this section shall prevent the service, repair or replacement of an odometer, provided the mileage indicated thereon remains the same as before the service, repair or replacement. Where the odometer is incapable of registering the same mileage as before such service, repair or replacement, the odometer shall be adjusted to read zero, and a written notice shall be attached, by the owner or an agent, to the left door frame of the vehicle, or other location as prescribed by the department, specifying the mileage prior to service, repair or replacement of the odometer and the date on which it was serviced, repaired or replaced. No person may, with intent to defraud, remove or alter such a notice so affixed. No person who services, repairs or replaces an odometer that is incapable of registering the same mileage as before such service, repair or replacement may fail to adjust the odometer to read zero or fail to attach the notice required by this subsection.
History:  1975 c. 121, 199; 1977 c. 29 s. 1654 (7) (a); 1993 a. 159; 2003 a. 166; 2011 a. 208.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.417 - Immobilization device tampering.

347.417
Immobilization device tampering.
(1)
No person may remove, disconnect, tamper with, or otherwise circumvent the operation of any immobilization device installed in response to a court order under s. 346.65 (6), 1999 stats., or s. 343.301 (2), 2007 stats. This subsection does not apply to the removal of an immobilization device pursuant to a court order or to necessary repairs to a malfunctioning immobilization device.
(2)
The department shall design a warning label which shall be affixed by the owner of each immobilization device before the device is used to immobilize any motor vehicle under s. 346.65 (6), 1999 stats., or s. 343.301 (2), 2007 stats. The label shall provide notice of the penalties for removing, disconnecting, tampering with, or otherwise circumventing the operation of the immobilization device.
History:  1991 a. 277; 1999 a. 109; 2001 a. 16 ss. 3445h to 3445m, 4060hg, 4060hj, 4060hw, 4060hy; 2009 a. 100.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.42 - Windshield wipers.

347.42
Windshield wipers.
No person may operate on a highway any motor vehicle equipped with a windshield, except a moped or motorcycle, unless the motor vehicle also is equipped with a device for cleaning rain, snow or other moisture from the windshield. The device shall be so constructed as to be controlled or operated by the operator of the vehicle and shall at all times be maintained in good working order.
History:  1979 c. 163; 1983 a. 243; 1985 a. 65; 2019 a. 50.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.43 - Safety glass.

347.43
Safety glass.
(1g)
In this section, “safety glass" means glass so treated or combined with other materials as to reduce, in comparison with ordinary sheet glass or plate glass, the likelihood of injury to persons by objects from external sources or by such glass when it is struck, cracked or broken.
(1s)
No person may operate upon a highway any motor vehicle manufactured after January 1, 1936, except a recreational vehicle other than a 5th-wheel recreational vehicle, unless the motor vehicle is equipped with safety glass wherever glass is used on the motor vehicle in partitions, doors, windows or windshields.
(2)
No person may sell any new motor vehicle unless such vehicle is equipped with safety glass in accordance with the requirements of sub. (1s).
(4)
If a common carrier or person operating under a permit or certificate issued by the department is convicted of operating a vehicle in violation of this section, the department may suspend or revoke the permit or certificate until such time as the vehicle has been equipped with safety glass as required by this section.
History:  1977 c. 29 s. 1654 (9) (f); 1981 c. 347; 1985 a. 187; 1993 a. 16; 1999 a. 85; 2007 a. 60.
Sub. (1) [now sub. (1s)] requires that whenever broken glass is replaced in a vehicle it must be replaced with safety glass. Replacing glass with plastic violated this section, and an officer observing a vehicle with replacement plastic had probable cause to stop the vehicle for a violation of this section. State v. Longcore, 2001 WI App 15, 240 Wis. 2d 429, 623 N.W.2d 201, 00-1171.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.435 - Vehicle monitoring and feedback.

347.435
Vehicle monitoring and feedback.
Notwithstanding s. 346.88, a person may operate a vehicle that has a device mounted to the front windshield if all of the following apply:
(1)
The device is designed to monitor the vehicle and provide feedback to the operator for the purpose of safety or improving vehicle operation.
(2)
The device is mounted directly above, behind, or below the mirror required in s. 347.40 (1) or, if no mirror is present, at the location where the mirror would typically be mounted.
(3)
The device is mounted in a manner consistent with applicable federal requirements if the vehicle is a commercial motor vehicle as defined in 49 CFR 390.5.
History:  2015 a. 160.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.44 - Painting requirements for school buses; restrictions as to painting of other vehicles.

347.44
Painting requirements for school buses; restrictions as to painting of other vehicles.
(1)
All school buses shall be painted as follows:
(a)
With the exception of trim, the body, including hood, fenders, cowl and roof shall be painted a uniform color, national school bus glossy yellow, according to national institute of standards and technology specifications;
(b)
The body trim, if used, shall be black; and
(c)
The words, “SCHOOL BUS", in black letters at least 8 inches high shall appear on both the front and rear of the upper body area or on a sign attached thereto.
(2)
A motor vehicle described in s. 340.01 (56) (b) may, but need not, comply with sub. (1). If the motor vehicle complies with sub. (1), the vehicle shall comply with other regulations relating to school buses prescribed by the department by rule.
(3)
No person may paint or in any way designate a motor vehicle in the manner described in sub. (1) except as expressly authorized by this section.
(4)
When a motor vehicle in compliance with sub. (1), s. 347.25 (2), and the rules of the department relating to school bus equipment is no longer operated as a school bus, the registration of the motor vehicle for another purpose may not be permitted until the owner:
(a)
Physically removes the signs identifying the vehicle as a school bus, the lights required by s. 347.25 (2) and such other equipment as the department may specify by rule; and
(b)
Repaints the entire vehicle to a color other than national school bus glossy yellow or any color commonly referred to as yellow.
History:  1975 c. 121, 199, 224, 429; 1977 c. 29 s. 1654 (7) (e); 1977 c. 228; 1979 c. 221; 1983 a. 175; 1985 a. 287; 1989 a. 165.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.445 - Crossing gates for school buses.

347.445
Crossing gates for school buses.
No person may operate a school bus that is painted as provided in s. 347.44 unless it is equipped with a retractable crossing gate on the front of the bus that, when in use, prevents children from crossing in front of the school bus in such proximity that they are not visible to the operator of the school bus from the operator's seat. The secretary shall prescribe rules for the specifications, installation, and operation of crossing gates required under this section.
History:  2001 a. 58.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.447 - Additional safety mirrors on school buses.

347.447
Additional safety mirrors on school buses.
A school bus that is painted as provided in s. 347.44 may be equipped with a supplemental mirror system, mounted on the passenger side of the school bus and designed to enhance operator visibility of children near the passenger side of the school bus, if the supplemental mirror system does not make inoperative or diminish the performance of any other mirror or safety device required on the school bus.
History:  2011 a. 223.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.455 - Modifications to height of vehicle.

347.455
Modifications to height of vehicle.
(1)
Except as further provided in this section, no person may operate any vehicle on a highway if modifications have been made to the suspension system, axles or chassis of the vehicle which cause any portion of the vehicle to ride more than 4 inches above the height of the vehicle specified by the manufacturer. The height of the vehicle shall be measured from the level surface on which the vehicle stands.
(2)
If the modification is for the purpose of strengthening or improving handling, modifications may be made to the suspension system, axles or chassis of a 4-wheel drive vehicle or a motor truck which has a gross weight of not more than 8,000 pounds which cause the vehicle to ride 5 or less inches above the height of the vehicle specified by the manufacturer. The height of the vehicle shall be measured from the level surface on which the vehicle stands.
(3)
A 4-wheel drive vehicle or a motor truck which has a gross weight of not more than 8,000 pounds may be modified to use a tire and wheel size which exceeds the wheel and tire size specified by the manufacturer for the vehicle by up to 4 inches in radius.
(4)
No person may operate any vehicle on a highway if modifications have been made to the suspension system, axles, chassis or exhaust system of the vehicle which cause any portion of the vehicle, except the tires, to extend below lines drawn from the bottom of each wheel rim to the points of contact between the tires on the opposite side and opposite end of the vehicle and the level surface on which the vehicle stands.
History:  1981 c. 216; 1993 a. 165.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.46 - Fenders and mudguards.

347.46
Fenders and mudguards.
(1)
No person shall operate a vehicle of the tractor type on a highway unless the driving wheels of such vehicle are protected by suitable fenders.
(2)
No person shall operate on a highway in intercity movement any privately owned motor truck or privately owned semitrailer drawn by a truck tractor, except those motor trucks and semitrailers equipped with dump bodies, unless such motor truck or semitrailer is equipped with rear fenders or mudguards of such material and so constructed and placed as to restrict to a minimum the splashing of water, mud or other material which may be thrown by the rear wheels. Such rear fenders or mudguards shall meet the following minimum specifications:
(a)
The fenders or mudguards shall cover the tire or multiple tires they are protecting starting at the top from a line drawn vertically through the center of the axle and extending rearward and downward so that the fender or mudguard under any condition of operation or loading of the vehicle has a ground clearance of not more than one third of the horizontal distance from the center of the rearmost axle to the fender or mudguard;
(b)
The fenders or mudguards shall be at least as wide as the tire or multiple tires they are protecting;
(c)
If the vehicle is so designed and constructed that the rear wheels are covered in the manner specified in pars. (a) and (b) by means of fenders, body construction or other means of enclosure, then no special mudguards are required. Otherwise, the vehicle shall be equipped with special mudguards to the extent necessary to meet the requirements of pars. (a) and (b).
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.47 - Drawbars, trailer hitches and mobile home couplings.

347.47
Drawbars, trailer hitches and mobile home couplings.
(1)
No person shall operate a vehicle towing or drawing another vehicle or vehicles on a highway if the drawbar or other connection between any 2 vehicles exceeds 12 feet in length.
(2)
No person shall operate a motor vehicle drawing a trailer, semitrailer, recreational vehicle, or mobile home upon a highway unless the hitch and coupling attaching the trailer, semitrailer, recreational vehicle, or mobile home to the vehicle by which it is drawn is of such construction as to cause such trailer, semitrailer, recreational vehicle, or mobile home to follow in direct line with the propelling vehicle without dangerous side swing or wobble. The hitch and coupling, the surface to which they are attached, and the connections, shall be of sufficient strength to prevent failure under all conditions of operation. The hitch is that part of the connecting mechanism, including the coupling platform and its attaching members or weldments, which is attached to the towing vehicle. The coupling is that part of the connecting mechanism, including the coupling and its attaching members or weldments, which is attached to the trailer, recreational vehicle, or mobile home and by which connection is made to the hitch. If a device is used between the trailer proper and the coupling such as a pole, such device shall also meet the requirements of this section.
(3)
In addition to the hitch and coupling specified in sub. (2), every towed vehicle shall be coupled to the towing vehicle by means of safety chains, leveling bars or cables. This requirement does not apply to a semitrailer having a connecting device composed of a 5th wheel and kingpin assembly, nor to a pole or pipe dolly. The safety chains, leveling bars or cables shall have only the necessary slack to permit proper turning and safety chains or cables shall be so connected to the towed and towing vehicle to prevent the drawbar from dropping to the ground if the hitch or coupling disengages. Two separate lengths of safety chain, leveling bars or cable shall be required on all trailers and mobile homes; however, the department may authorize use of such other appropriate equipment or methods approved by nationally recognized organizations which recommend safety standards for motor vehicles.
(4)
Trailer, semitrailer, recreational vehicle, and mobile home couplings and the safety chains, leveling bars or cables shall be of such minimum strength, design and type as established by published rule of the department.
History:  1971 c. 88; 1977 c. 29 s. 1654 (7) (e); 1979 c. 34; 2007 a. 11.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.475 - Airbags, prohibited practices.

347.475
Airbags, prohibited practices.
(1)
In this section, “airbag" means an inflatable restraint system that is designed to be installed and to operate in a motor vehicle to deploy by inflating upon an impact of the vehicle with another object.
(2)
No person may, either personally or through an agent, sell, install, reinstall, or distribute any previously deployed airbag. This subsection does not apply to the sale of a motor vehicle with a previously deployed airbag unless the deployment is concealed or disguised.
(3)
No person may, either personally or through an agent, remove, disconnect, tamper with, or otherwise circumvent the operation of any airbag, except for the purpose of testing, repairing, or maintaining an airbag, salvaging an undeployed airbag, disposing of a deployed airbag, or replacing a deployed airbag with a functional airbag. This subsection does not apply to the installation or use of an on-off switch by any person who is authorized by federal law or regulation to install or use an on-off switch for an airbag.
(4)
No person may, either personally or through an agent, install a cover or otherwise conceal or disguise a missing airbag or a previously deployed airbag.
History:  2001 a. 28.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.485 - Protective headgear for use on motorcycles.

347.485
Protective headgear for use on motorcycles.
(1)
(a)
No person who holds an instructional permit under s. 343.07 (4) or who is under 18 years of age may operate or ride upon a motorcycle on any highway unless the person is wearing protective headgear of a type which meets the standards established for motorcycle operation in 49 CFR 571.218 and the chin strap is properly fastened.
(am)
No person may operate a motorcycle when carrying a passenger under 18 years of age unless the passenger is wearing protective headgear.
(b)
No person may sell or offer for sale any protective headgear for use by a driver or passenger on a motorcycle, not meeting the standards established for motorcycle operation in 49 CFR 571.218.
(2)
(a)
No person may operate a motorcycle on any highway without wearing any of the following eye protection:
1.
A protective face shield attached to the headgear.
2.
Glasses.
3.
Goggles.
(b)
Except for photosensitive corrective glasses prescribed by an ophthalmologist, physician, oculist or optometrist, eye protection worn during hours of darkness may not be tinted or darkened.
(c)
Notwithstanding par. (a), if the vehicle is an autocycle equipped with a windshield or a motorcycle equipped with a windshield that rises a minimum of 15 inches above the handlebar, the use of other eye protective devices is not mandatory.
(d)
This subsection shall not apply to persons operating a motorcycle in a parade sanctioned by the local municipality.
(3)
No person may rent, lease or loan a motorcycle to another unless he or she has ascertained that such party has the required eye protection and, if the party holds an instructional permit under s. 343.07 (4) or is under 18 years of age, that the party has the required protective headgear for operating the motorcycle.
(4)
Every person in the motorcycle rental business shall have clean, usable protective headgear for rent in sufficient quantity to care for the needs of all customers.
History:  1977 c. 29 s. 1654 (7) (e); 1977 c. 204, 447; 1983 a. 133, 243, 538; 1985 a. 65, 85; 2019 a. 50.
Three-wheeled trucks and automobiles, golf carts, and other special purpose vehicles such as street sweepers, industrial fork-lifts, and motorized wheelbarrows are not motorcycles, and operators are not subject to this section. 58 Atty. Gen. 17.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.486 - General requirements.

347.486
General requirements.
(1)
No person may operate a motorcycle if the handlegrips of the handlebars rise more than 30 inches above the lowest point of the top of the driver's seat when the seat is occupied.
(2)
No person may operate a motorcycle with an improvised, defective or repaired handlebar.
(3)
No person may operate a motorcycle without a functioning muffler.
History:  1979 c. 163; 1983 a. 243; 1985 a. 65; 2019 a. 50.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.487 - Seating requirements.

347.487
Seating requirements.
Except as provided in s. 346.595 (3m), no more than 2 persons may ride on a motorcycle during operation, and then only if the vehicle is equipped and designed with adequate seats and foot rests or pegs. Foot rests or pegs shall be mounted in accordance with manufacturer's specifications. In the absence of manufacturer's specifications, foot rests or pegs for the passenger shall be located on the same horizontal plane as those of the operator.
History:  1983 a. 243; 1985 a. 65; 2019 a. 50.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.488 - Moped equipment.

347.488
Moped equipment.
No person may operate a moped unless:
(1)
The moped complies with all federal emission, equipment and safety standards applicable at the time of manufacture;
(2)
None of the original equipment installed on the moped by the manufacturer has been replaced with equipment of lesser performance characteristics; and
(3)
The performance characteristics of the moped have not been altered so as to enable it to exceed the maximum design speed authorized for a moped under s. 340.01 (29m).
History:  1977 c. 288.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.49 - Equipment of vehicles transporting flammable liquids.

347.49
Equipment of vehicles transporting flammable liquids.
(1)
In this section, “flammable liquid" means any gasoline, naphtha, benzine, fuel oil, crude oil, kerosene or other liquid which has a flashpoint of 80 degrees Fahrenheit or less as determined by a Tagliabue or equivalent closed-cup test device.
(2)
No person shall transport in or on any motor vehicle, trailer or semitrailer upon a highway any flammable liquid except by tank mounted on or attached to or structurally a part of such motor vehicle, trailer or semitrailer and which is plainly marked to show that flammable liquids are being transported therein.
(3)
This section does not apply to transportation of flammable liquids as freight only by the consumer from the place of purchase to the place of consumption if such liquids are transported in drums or other containers having a capacity of not more than 100 gallons each and if the total amount of such liquids so transported in any one vehicle or combination of vehicles does not exceed 500 gallons.
History:  2017 a. 365 s. 111.
2023 Wisconsin Statutes & Annotations › Chapter 347 - Equipment of vehicles. › 347.50 - Penalties.

347.50
Penalties.
(1)
Any person violating ss. 347.35 to 347.49, except s. 347.385 (5), s. 347.413 (1) or s. 347.415 (1m), (2) and (3) to (5) or s. 347.417 (1) or s. 347.475 or s. 347.48 (2m) or (4) or s. 347.489, may be required to forfeit not less than $10 nor more than $200.
(1m)
Any person violating s. 347.385 (5) may be fined not more than $10,000 or imprisoned for not more than one year in the county jail, or both, for each violation.
(1s)
Any person violating s. 347.413 (1) or 347.417 (1) may be fined not less than $150 nor more than $600, or may be imprisoned for not more than 6 months, or both for the first offense. For a 2nd or subsequent conviction within 5 years, the person may be fined not less than $300 nor more than $1,000, or imprisoned for not more than 6 months, or both.
(1t)
In addition to the penalty under sub. (1s), if a person who is subject to an order under s. 343.301 violates s. 347.413, the court shall extend the order restricting the person's operating privilege under s. 343.301 (1g) or (2m) for 6 months for each violation.
(2)
Any person violating s. 347.415 (1m), (2), and (3) to (5) or 347.475 may be fined not more than $5,000 or imprisoned for not more than one year in the county jail, or both, for each violation.
(2m)
(a)
Any person who violates s. 347.48 (2m) (b) or (c) and any person 16 years of age or older who violates s. 347.48 (2m) (d) shall be required to forfeit $10.
(b)
No forfeiture may be assessed for a violation of s. 347.48 (2m) (d) if the violator is less than 16 years of age when the offense occurs.
(3)
(a)
Any person violating s. 347.48 (4) (am) may be required to forfeit not less than $30 nor more than $75 if the child is less than 4 years old.
(b)
No forfeiture may be assessed under par. (a) if all of the following apply:
1.
The motor vehicle was not equipped with a child safety restraint system meeting the requirements under s. 347.48 (4) (am) at the time the uniform traffic citation was issued.
2.
The person provides proof that, within 30 days after the uniform traffic citation was issued, a child safety restraint system meeting the requirements under s. 347.48 (4) (am) was purchased or leased and properly installed in the motor vehicle.
3.
The person has not, within the immediately preceding 3 years, been issued a uniform traffic citation for a violation of s. 347.48 (4) (am).
(4)
Any person violating s. 347.48 (4) (am) may be required to forfeit not less than $10 nor more than $25 for the first offense if the child is at least 4 years old and less than 8 years old. For a 2nd or subsequent conviction within 3 years involving a child who is at least 4 years old and less than 8 years old, a person may be required to forfeit not less than $25 nor more than $200.
(5)
Any person violating s. 347.489 may be required to forfeit not more than $20.
History:  1971 c. 278; 1975 c. 121; 1981 c. 327; 1983 a. 243; 1985 a. 309; 1987 a. 132; 1989 a. 22; 1991 a. 26, 277; 2001 a. 28; 2003 a. 166; 2005 a. 106, 193; 2007 a. 97; 2009 a. 28, 100; 2017 a. 124.
2023 Wisconsin Statutes & Annotations › Chapter 348 - Vehicles — size, weight and load. › 348.02 - Applicability of chapter.

348.02
Applicability of chapter.
(1)
The provisions of this chapter restricting the size, weight and load of vehicles apply also to vehicles owned by or operated by or for a governmental agency, subject to such exceptions in this chapter.
(2)
The provisions of this chapter restricting the size and weight of vehicles apply to the vehicle and any load which it is carrying except as otherwise provided in this chapter.
(3)
Any owner of a vehicle who causes or permits such vehicle to be operated on a highway in violation of this chapter is guilty of the violation the same as if the owner had actually operated the vehicle.
(4)
The limitations on size, weight and load imposed by this chapter do not apply to road machinery actually engaged in construction or maintenance of a highway within the limits of the project.
(5)
The limitations on weight, length and number of vehicles in combination imposed by this chapter shall not apply to a combination of vehicles in an emergency towing operation in which the towing vehicle is being used to remove a stalled or disabled vehicle or combination of vehicles from the highway to the nearest adequate place for repairs, or in which the towing vehicle is an emergency truck tractor temporarily substituted for a stalled or disabled truck tractor. The vehicle owner or the owner's agent shall designate the nearest adequate place for repairs for vehicles or combinations of vehicles exceeding the statutory length limits or limits on the number of vehicles in combination.
(6)
The provisions of this chapter apply to implements of husbandry and agricultural commercial motor vehicles.
History:  1977 c. 197; 1979 c. 348; 1981 c. 268, 312, 390; 1989 a. 134; 1991 a. 316; 2013 a. 377.
2023 Wisconsin Statutes & Annotations › Chapter 348 - Vehicles — size, weight and load. › 348.03 - Self-certification for agricultural commercial motor vehicles.

348.03
Self-certification for agricultural commercial motor vehicles.
(1)
The department shall prescribe a form for the owner or operator of an agricultural commercial motor vehicle to certify that the vehicle and its operation satisfy all requirements specified in the definition under s. 340.01 (1o).
(2)
The certification on the form under sub. (1) of an owner or operator of an agricultural commercial motor vehicle may be offered to the department or any traffic officer as evidence of the truth of the matters asserted in the certification, but the certification is not conclusive of such matters.
History:  2013 a. 377.
2023 Wisconsin Statutes & Annotations › Chapter 348 - Vehicles — size, weight and load. › 348.09 - Projecting loads on side of vehicles.

348.09
Projecting loads on side of vehicles.
(1)
No person, without a permit therefor, may operate on a highway any motor vehicle, trailer or semitrailer carrying any load extending beyond the fender line on the left side or extending more than 6 inches beyond the fender line on the right side of the vehicle.
(2)
This section applies even though the total width of the vehicle and load does not exceed the maximum permitted under s. 348.05.
(3)
(a)
Subject to par. (b), this section does not apply if the load is an implement of husbandry being transported as provided in s. 348.05 (2g) or (3m) or an agricultural commercial motor vehicle being transported as provided in s. 348.05 (3r) or (3t).
(b)
No person may transport by trailer or semitrailer on a highway an agricultural commercial motor vehicle exceeding 8 feet 6 inches in total outside width unless the agricultural commercial motor vehicle is equipped with at least 2 amber flashing warning lamps that are lighted and visible from both the front and rear. When lighted, these lamps shall be capable of being seen and distinguished under normal atmospheric conditions during hours of darkness at a distance of 500 feet from the front and rear of the agricultural commercial motor vehicle. These lamps shall be mounted, as nearly as practicable, to indicate the extreme width of the agricultural commercial motor vehicle, but not more than 16 inches from the lateral extremities of the agricultural commercial motor vehicle.
History:  1999 a. 85; 2013 a. 377; 2015 a. 15, 232.
2023 Wisconsin Statutes & Annotations › Chapter 348 - Vehicles — size, weight and load. › 348.11 - Penalty for violating size and load limitations.

348.11
Penalty for violating size and load limitations.
(1)
Any person violating s. 348.09 or 348.10 may be required to forfeit not less than $10 nor more than $200.
(2)
Any person violating ss. 348.05 to 348.08 may be required to forfeit not less than $50 nor more than $100 for the first offense and may be required to forfeit not less than $100 nor more than $200 for the 2nd and each subsequent conviction within one year.
(3)
Any person violating s. 348.105 may be required to forfeit not less than $2,000 nor more than $5,000.
History:  1971 c. 278; 2015 a. 137.
2023 Wisconsin Statutes & Annotations › Chapter 348 - Vehicles — size, weight and load. › 348.16 - Weight limitations on class “B" highways.

348.16
Weight limitations on class “B" highways.
(1)
In this section, “class `B' highway" includes those county trunk highways, town highways and city and village streets, or portions thereof, which have been designated as class “B" highways by the local authorities pursuant to s. 349.15.
(2)
Except as provided in sub. (3) and s. 348.175 and subject to any modifications made by a city of the first class pursuant to s. 349.15 (3), no person, without a permit therefor, shall operate on a class “B" highway any vehicle or combination of vehicles imposing wheel, axle, group of axles, or gross weight on the highway exceeding 60 percent of the weights authorized in s. 348.15 (3). This subsection does not apply to an implement of husbandry or agricultural commercial motor vehicle being operated or transported, or to a 2-vehicle combination transporting an implement of husbandry or agricultural commercial motor vehicle, as described in s. 348.15 (9) (c), (cm), (e), or (f) 1. or 1m.
(3)
(a)
Any motor vehicle whose operation is pickup or delivery, including operation for the purpose of moving or delivering supplies or commodities to or from any place of business or residence that has an entrance on a class “B" highway, may pick up or deliver on a class “B" highway without complying with the gross vehicle weight limitations imposed by sub. (2).
(b)
Subsection (2) does not apply to a vehicle operated by or at the direction of a public utility, as defined in s. 196.01 (5), a telecommunications provider, as defined in s. 196.01 (8p), or a cooperative association organized under ch. 185 for the purpose of producing or furnishing heat, light, power, or water to its members, that is being operated for the purpose of responding to a service interruption.
(c)
Subsection (2) does not apply to the operation of any skidder, forwarder, harvester, or wheeled feller buncher under circumstances for which there is no weight limitation under s. 348.15 (10).
(d)
Subsection (2) does not apply to a motor vehicle that is being operated to deliver propane for heating purposes if the gross weight imposed on the highway by the vehicle does not exceed 30,000 pounds, for a vehicle with a single rear axle, or 40,000 pounds, for a vehicle with tandem rear axles, and, if the motor vehicle is a tank vehicle, the tank is loaded to no more than 50 percent of the capacity of the tank. A tank vehicle operated under this paragraph shall be equipped with a gauge on the tank that shows the amount of propane in the tank as a percent of the capacity of the tank and shall carry documentation of the capacity of the tank either on the cargo tank or in the cab of the vehicle.
History:  1981 c. 312; 2001 a. 16; 2009 a. 177; 2011 a. 257; 2013 a. 377; 2015 a. 15, 44, 171; 2017 a. 59, 68.
2023 Wisconsin Statutes & Annotations › Chapter 348 - Vehicles — size, weight and load. › 348.175 - Seasonal operation of vehicles hauling peeled or unpeeled forest products cut crosswise or abrasives or salt for highway winter maintenance.

348.175
Seasonal operation of vehicles hauling peeled or unpeeled forest products cut crosswise or abrasives or salt for highway winter maintenance.
The transportation of peeled or unpeeled forest products cut crosswise or of abrasives or salt for highway winter maintenance in excess of gross weight limitations under s. 348.15 shall be permitted during the winter months when the highways are so frozen that no damage may result thereto by reason of such transportation. If at any time any person is so transporting such products or abrasives or salt upon a class “A" highway in such frozen condition then that person may likewise use a class “B" highway without other limitation, except that chains and other traction devices are prohibited on class “A" highways but such chains and devices may be used in cases of necessity. On the first day that conditions warrant their determination of such frozen condition and freedom of damage to such highways by transportation, the officers or agencies in charge of maintenance of highways shall declare particular highways, or highways within areas of the state, as eligible for increased weight limitations, and each declaration shall be effective as of 12:01 a.m. on the 2nd day following the declaration. Such declaration shall include the maximum weight on each axle, combination of axles and the gross weight allowed. Any person transporting any such product over any highway of this state under this section is liable to the maintaining authority for any damage caused to such highway. This section does not apply to the national system of interstate and defense highways, except for the I 39 corridor and the I 41 corridor.
History:  1983 a. 531; 1991 a. 316; 1995 a. 113; 2005 a. 167; 2009 a. 28; 2015 a. 55, 360.
The phrase “peeled or unpeeled forest products cut crosswise" does not encompass wood chips. The phrase instead invokes images of logs, posts, poles, or similar pieces of timber, with or without bark, and cut to length. State v. T.P. Trucking, 2006 WI App 98, 293 Wis. 2d 273, 715 N.W.2d 736, 05-2496.