西延高铁进入试运行阶段

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​11月17日，随着55302次试验动车组从西安北站缓缓驶出，沿着新建西安至延安高速铁路驶向延安站方向进行列车运行图参数测试，标志着西延高铁正式从联调联试阶段全面转入运行试验（简称“试运行”）阶段。经过前期64天的联调联试，西延高铁动态TQI（轨道质量指数）平均值仅1.33，达到一次性建成高铁线路TQI指数的全国领先水平，为后续线路开通奠定坚实基础。（梅镱泷 张远 视频来源：西安铁路局）

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中国新闻社

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