> the ICE gets stuck behind a slower train, increasing the delay, etc. Right here. Those slower (older) trains don't magically get any faster just because the

> the ICE gets stuck behind a slower train, increasing the delay, etc. Right here. Those slower (older) trains don't magically get any faster just because the train behind it sped up. > pack the schedule You actually can't just double it up because faster trains need bigger gaps between them, just like driving on a motorway. If the train in front needs to slow/stop for whatever reason, you don't want the train behind smashing into it at 400km/h because it was tailgating.