A) Except as otherwise shown in tariffs making reference hereto, the distances shall be computed from the point of loading to the point of unloading by the shortest highway route and shall be ascertained by compilation of distances as shown in =(a) Zip Code Mileage Guide, HGB 105 (series), issued by Household Goods Carrier's Bureau, Inc., Agent, and by supplements thereto and successive reissues thereof, or +(b) Section 2, RNLO 500, issued by R & L TRANSFER, INC.
B) Where the shipper, consignee or owner requests transportation of a shipment over a route longer than the shortest route, the mileage over the longer route shall be used to determine the charge.
C) In determination of mileage, fractions of a mile shall be increased to the next whole figure.