Why is there no high-speed freight train? Are passenger?

Question:
high-speed railway construction is in full swing in the start.
all the construction, the planned high-speed railway and locomotive power group, how it appears looking all passenger? Is
do not need high-speed freight? Do not need big leap?
passenger high-speed railway freight trains can travel? The freight cars would not slow down high-speed passenger car?

Answer:
right, high and low speed of the transport capacity of the affected line is a great general the most high-speed and minimum speed can not exceed 80 kilometers, such as Beijing and Shanghai is 200 km Line of EMU, the Part of the opening line of goods train and truck line packages can be up to 120 km a;
no need to transport high-speed, after all, carrying a large amount of logistics to speed up the pace of technology by improving the speed, obviously not the most important, the most important thing is to speed up the loading and unloading Cart links section to shorten the marshalling yard and station operation time and residence time (so the railway line will be more open to re-to re-direct and direct goods)

high-speed dedicated passenger railway lines, is to enable more efficient passenger and cargo triage, after all, high-speed passenger and heavy goods vehicles going in a line, the impact of all of their major;

China also has freight lines, the most famous case of Daqin Railway (Datong - Qinhuangdao), the full opening line is 20,000 tons class, million-ton coal car.2007-11-11
问题:
高速铁路建设正如火如荼的展开中。
所有兴建中、规划中的高速铁路和机车动力组，怎么看来看去全部都是客运？
难道货运不需要高速？不需要大跨越？
客运用高速铁路能不能行驶货运火车？慢速的货运车不会拖累高速的客运车吗？

回答:
对，速度的高低对线路运能的影响是很大的，一般最高速和最低速不能超过80公里，比如现在京沪线开行200公里的动车组后，部分按货车开行的行包专列和货车可以开到120公里了；
货运没必要高速，毕竟运载量大，要加快物流速度，通过提高技术速度，显然不是最主要的，最主要的还是加快装卸车环节、缩短编组站和区段站技术作业时间及停留时间（所以铁路会开行更多的重来重去的直达及直通货车）

建设铁路高速客运专线，就是为了更有效的使客货分流，毕竟高速客车和重载货车在一条线上走，对各自的影响都是重大的；

中国也有货运专线，最出名的属大秦铁路（大同-秦皇岛），全部开行的是2万吨级、万吨级的煤车。2007-11-11

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