跟车时间百分比（延误率）是衡量双车道公路服务水平的一个重要指标。
Percent Time-Spent-Following (Percent Time Delay) is an important index to estimate Level-of-Service of tow-lane highways.
公路服务用户满意度模型是评价公路服务质量、提高公路服务水平的重要工具。
Customer satisfaction model of highway service is a very important tool to evaluate and improve service quality of highway sector.
在满足公路路线实际规范的条件下，公路服务水平的高低、工程的经济性在很大程度上取决于设计阶段的综合线形设计。
Under the conditions of meeting with highway alignment, the level of highway service, the economical level of the project is decided by comprehensive alignment design at the design stage.
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