So the study of highway intersection safety diagnosis and improvement method is very important to low death and injuries, as well as improving the whole highway system traffic safety.

因此，研究公路平面交叉口的安全诊断改善技术对于提高整个公路系统的交通安全，降低交通事故率和死亡率具有重要的意义。

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So the study of highway intersection safety diagnosis and improvement method is very important to low death and injuries, as well as improving the whole highway system traffic safety.

因此，研究公路平面交叉口的安全诊断改善技术对于提高整个公路系统的交通安全，降低交通事故率和死亡率具有重要的意义。

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