(a) 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.
(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 control over the driving mechanism of the vehicle.
(c) No school bus shall be operated on the streets or highways in this state when loaded with passengers in excess of the number for which such bus is designed to carry. The number of passengers determined by the local school board which the bus is designed to carry shall be posted in a conspicuous place on the bus.
Laws 1961, p. 389, § 11-1104; Laws 1967, c. 256, § 1.