>>1811306>All types of traffic (long/short-distance, passenger/freight) are supposed to use the same lines, the same tracks.But why
Korea tried to build a high speec line together with an urban rail, but realized the extra cost on signaling system and the loading gauge for high spees train will cost too much extra and not to mention disruption to urban rail service, and decided to split the project.
Japan currently have the Seikan tunnel sharing track between freight and high speed rail, which severely limit train speed at this section, and also restrict freight train operation, causing them to think of how to separate high speed train operation by time to allow the trains run faster whenever they operate
And China simply banned freight trains from high speed rail tracks, while also pushing out slow passenger trains from high speed track with new low speed train locomotives and as high speed track gain speed improvement
> The layout of lines designed for trains capable of speeds that high also often makes the use by weaker trains impossible. Take the KRM: Only ICE3 and ICE4 are allowed to run there due to the steep inclination. No other types of train.Supposedly, a high speed line should be designed with as little gradient as possible, to allow high speed operation.
>Unlike a country like France, Germany has many large agglomeration zones, and unlike Japan, those zones aren't essentially along a straight line.Hamburg-RhineRuhr-Frankfurt-Munich is on a single line the same way as Japanese cities are on a single line from Sapporo to Kagoshima. And yet Japan still manage to build high speed rails to cities outside this line, like to Hokuriku and Niigata.
