Scroll down for Federal Trucking Regulations

Best viewed at 1024 x 768

WIDTH: The Federal law mandates that every state allow a maximum of 102"in.
                If the state doesn't permit up to 102"in. wide vehicles to travel on all
                interstates, & some designated highways, it could lose Federal highway
funds.

LENGTH: The Federal law (sec.411) mandates that every state allow a minimum of
        48'ft  for single trailers, 28'ft each for double trailers. A maximum of 53'ft
       (57'ft in  some states) for single trailers.  This law overrides the state laws
        establishing  limits less than 48'ft for interstates,& some designated  highways.
       No state is allowed to set tractor length limits.

WEIGHT: The Federal law (sec.133) mandates that every state must allow a
        maximum gross weight of 80,000#lbs(40T) or lose Federal funds.

Wisconsin's Size and Weight Limits:

Max. Length.....53 ft. (trailer)
Max. Height.....13 ft. 6 in.
Max. Width.....8 ft. 6 in.
Max. Gross.....80,000 (40 ton)
Single Axle.....20,000 (10 ton)
Tandem Axle.....34,000
For other Wisconsin Motor Carrier Services, click here.

 Drivers
      Must carry one, and only one, commercial driver's license issued by their
      home state. A license is issued only after extensive knowledge and skills
      tests are passed. Bus operators and hazardous materials drivers must pass
      additional tests.
      Must pass a complete physical examination every two years.
      Are limited by strict hours-of-service rules to avoid driving while fatigued.
      These rules include maintaining a detailed driver's log book. These and other
      requirements subject the driver to random roadside inspections, at which
      time they can be put “out-of-service” or lose their driving privileges for
      committing violations.
      Are subject to severe penalties, including loss of the right to continue driving
      for their livelihood, if they violate motor carrier highway safety regulations.
 Vehicles
      Must be inspected daily before and after every run and must undergo a
      major inspection at least once a year.
      Are subject to random safety road checks and can be ruled “out of
      serviceman the spot. Vehicles are not allowed back on the road until the
      defect or violation has been corrected.
      Are subject to rigid insurance and liability requirements.

For more info click on the link.
Federal Motor Carrier Safety
Regulations, Rules and Notices