A. 
There is hereby established a system of truck routes within the township. All trucks having a gross weight in excess of four tons shall be excluded from all streets in the township except the streets or parts of streets described in Schedule VI (§ 251-39), attached to and made a part of this chapter, which form a part of the system of truck routes upon which trucks are permitted to travel and operate.
B. 
Nothing within this section shall be construed as preventing such trucks from making deliveries of merchandise or other property along streets from which such trucks are excluded or as excluding from any street in the township any trucks used by public utility companies in connection with the construction, installation, operation or maintenance of public utility facilities.