China tested trains running at more than 400km/hr and impact of two trains passing each other at 420km/hr each.
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Currently, high-speed trains in China run at speeds ranging from 250 to 300 km/hr. Super high-speed train test was carried out in Zhengzhou City of central China's Henan Province.
An expert said the airflow created by the high speed would have a great impact on the trains. Experts cautioned against commercially using trains exceeding speed of 400 km/hr as higher speeds incur much higher operation costs.