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1·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。

2·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。

3·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。

4·To reduce the seaport, airport and land port's traffic pressure, a dividing road net system is set up, which the passenger is separated from freight is advanced.

针对交通特征提出了建立客、货分流的路网体系，以解决海港、空港、口岸货运的交通压力。