When conventional urban transportation organizing and managing means are hard to obtain good results, transportation circumscription as a tougher means is raised.
当常规的交通组织和管理手段难以取得良好的效果时，交通屏蔽圈作为较为强硬的手段被提出了。
2
The Zhaozhou bridge played the role of an important transportation link and as a conventional bridge until 1984, when the park was built.
一百到1984年建公园以前，赵州桥仍作为一个正常的文通运输桥梁发挥着作用。
3
When a new traffic mode is introduced into current transportation system, the conventional travel demand forecasting method based on revealed preference data will be useless for modal split.