In terms of efficiency and cleanness, buses, trains and other forms of public or mass transportation are superior to the private automobile.

在效率和清洁方面，公共汽车、火车和其他形式的公共或大众交通工具优于私家车。

Cities in the United States and Europe have increased security in and around their mass transportation systems.

在美国和欧洲的城市已经增加了他们在大规模交通体系内部和周围的安全措施。

Mass transportation system has already been a very important public traffic facility in the developed countries.

轨道交通在发达国家已经成为非常重要的公共交通工具。

As a result, American cities are now struggling to install energy-saving mass transportation in their dispersed, suburban layouts.

因此，美国正积极在分散的郊区规划中配置大量节能的公共交通运输系统。

This simulation will also allow a user and or multiple users to simulate various job duties associated with mass transportation.

这种模拟也将允许用户或者多个用户，模拟各种工作职责相关的大众运输。