When more than one mode, or more than one carrier within a mode, can satisfy the service requirements of a specific shipment at the same lowest aggregate delivered cost, the carrier/mode determined to be the most fuel efficient will be selected. In determining the most fuel efficient carrier/mode, consideration will be given to such factors as use of the carrier's equipment in ``turn around'' service, proximity of carrier equipment to the shipping activity, and ability of the carrier to provide the most direct service to the destination points.