service levels for this type of freight. In view of these problems, early efforts to initiate these services will [and are] likely to be: 1. U.S. carriers-FNM partnerships, with the former providing most of-the equipment (other than locomotives), training, and marketing. 2. Implemented for specific, large volume movements which can be serviced by unit trains. To ensure sufficient volume and reduce risk, major producers will be solicited to endorse the concept or, preferably, to make commitments prior to the initiation of service. For mechanically refrigerated railcars, the entire train would likely have to be devoted to perishables. For refrigerated containers and TOFC, perishables might form a section of a larger train. 3. Largely limited to major north-south routings where an updated communications infrastructure is already in place. In particular, it seems doubtful if the railroads will be able to secure overland import/export traffic in perishables to/from the areas south and east of Mexico City. 4. In some instances, limited to shorter runs near the border or, possibly, from ports to the Valley of Mexico. Examples of such shorter runs include the proposed movements from Sinaloa to the U.S. border and the plan to move deciduous fruits from the U.S. by rail, offloading to trucks in Monterrey (see Appendix II). Likely candidates for rail in the short and medium terms include: From the U.S. Pacific Northwest deciduous fruits Vegetables (primarily California vegetables when Sinaloa is not in production) Meats Containerized loadings of highly processed foods to serve the emerging supermarkets and warehouse stores From Mexico Winter vegetables Processed fruits and vegetables, including orange juice concentrate