349.03  DRIVERS' VIEW AND CONTROL TO BE UNOBSTRUCTED BY LOAD OR PERSONS.
   (a)   No person shall drive a vehicle when it is so loaded as to obstruct the view of the driver to the front or sides of the vehicle or as to interfere with the driver's control over the driving mechanism of the vehicle.
   (b)   No passenger in a vehicle shall ride in such position as to interfere with the driver's view ahead or to the sides, or to interfere with his or her control over the driving mechanism of the vehicle. 
(WVaC 17C-14-4)