The CN network model

摘要

The Canadian National Railways' desire to develop a network simulation grew in recent years with the availability of large third generation computers, better data bases, and the increasing tendency of key operating people to approach railroad problems from the systems viewpoint.

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As the volume of CN's market expands, the mix of traffic alters, resulting in a constantly changing geographical pattern of flow. In addition, the accent on traditional standards of service for such traffic as preference and bulk loads is shifting. The individual customer's requirements for such things as the pick-up time at his siding, the delivery time at the consignee, and consistency of service, are becoming more stringent.