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由铁道部第三勘测设计院与北京理正软件设计研究所合作研制开发的“铁路路基通用CAD系统”于1999年12月6日在北方交通大学通过了铁道部组织的鉴定。
The “Subgrade CAD System for Railway Subgrade” jointly developed by the Third Survey and Design Institute of the Ministry of Railways and the Beijing Institute of Software Design and Research passed the appraisal of the Ministry of Railways on December 6, 1999 at North Jiaotong University.