These tiers could categorize methods of operation in conjunction with safety improvements such as separation of passenger and freight traffic and advanced train control systems.

这些安全措施包括将客运流量与货运流量隔离，升级列车控制系统等。

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As an advanced model of transportation organization, the system of highway express freight transportation has realized rapid, safety, right and "door-to-door" service.

公路快速货运系统作为一种先进的运输组织形式，能够提供快速、安全、准确和“门到门”的运输服务。

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This paper introduces the advanced electronic commerce system of automatic match form of highway freight transport.

这里介绍了目前较为先进的自动撮合式公路货运电子商务系统。

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During one 20-minute stretch alone, three semi trucks from FedEx Freight and a smaller truck from Advanced Logistics trundled around to the back of a distribution center owned by Quanta.

FORBES: Magazine Article