No person shall drive a vehicle when it is so loaded, or when there are in the front seat such a number of persons, exceeding three, 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 or whenever any person in the front seat is not seated.
75 Pa.C.S. § 3704
Obstruction to driving view or mechanism
Known as the Vehicle Code
The act spans §§ 75–75 (898 sections).
Official source: Pennsylvania General Assembly. Reproduced from public-domain Pennsylvania statutes; confirm against the official source for the current text. Not legal advice.