Ramp metering is regarded as one of the best control strategies for freeway traffic system and is widely used.

在高速公路控制方法中，入口匝道控制是应用最广、效果最好的一种控制方法。

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Abstract: Aiming at the nonlinear and time-varying characteristics of freeway traffic system, a fuzzy self-adaptive PID controller is designed and applied to freeway ramp metering in this paper.

摘要：针对高速公路交通系统的非线性、时变特性，设计了一种模糊自适应控制器，并将其应用于高速公路匝道控制系统。

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Freeway traffic safety facilities system has vital function on the aspect of ensure freeway safe-running of vehicles, improving highway service level and so on.

高速公路交通安全设施系统在保障高速公路安全行车，提高公路服务水平等方面具有重要作用。

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Before the Games of the XXIII Olympiad, which were held at various locations in and around Los Angeles, officials tried to instill traffic panic in local residents, encouraging them to shift their commuting schedules and avoid the freeway system whenever possible.

FORBES: Carmageddon Is Upon Us!