ORS 815.270: Operating vehicle that is loaded or equipped to obstruct driver; penalty.

(1) A person commits the offense of operating a vehicle that is loaded or equipped to obstruct the driver if the person is operating a vehicle that is loaded or equipped or where baggage or an encumbrance does any of the following:

      (a) Substantially obstructs the driver’s views to the rear, through one or more mirrors and otherwise.

      (b) Obstructs the driver’s view to the front or sides.

      (c) Interferes with control of the driving mechanism.

      (d) Prevents the free, unhampered operation of the vehicle by the driver.

      (2) The offense described in this section, vehicle loaded or equipped to obstruct driver, is a Class C traffic violation.