Oregon Revised Statutes Oregon Vehicle Code § 814.130

(1) A person commits the offense of passenger obstruction of a driver if the person is a passenger in a vehicle and the person rides in a position that interferes with all of the operator's views to the rear, through one or more mirrors and otherwise, or that interferes with the operator's view to the front or sides or the operator's control of the driving mechanism.

(2) The offense described in this section, passenger obstruction of driver, is a Class C traffic violation.