11.28.040 TRUCK ROUTE—EXCEPTIONS.
When any such truck route or routes are established and designated by appropriate signs, the operator of any vehicle exceeding a maximum gross weight limit of five tons (GVWR), shall drive on such route or routes and none other, except for the following so long as they deviate from the truck route only at the intersection with the street nearest to the destination point:
(a) Vehicles traversing another street or streets for the purpose of making pickups or deliveries of goods, wares and merchandise from or to any building or structure located on a restricted street or streets.
(b) Vehicles delivering materials to be used in the maintenance, repair, alteration, remodeling or construction of any building or structure upon such restricted street, for which a building permit has been previously obtained.
(c) Any vehicle owned by a public utility while necessarily in use in the construction, installation, maintenance or repair of any public utility.
(d) Tow trucks or moving vans providing a service on a street.