difference between traffic hub and traffic junction? (Verkehrsknotenpunkt)

[Torsten]

Hi, as far as I understand, a traffic hub is bigger than a traffic junction. For example, London Heathrow can be called a traffic hub while a very busy crossroads can be called a traffic junction, is that right? I'm looking for a good translation of the German term "Verkehrsknotenpunkt".

Many thanks,
Torstne
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[Jamie (K)]

Wikipedia: "Grundlegend für Verkehrsknotenpunkte sind überregional bedeutsame Autobahnkreuze, Bahnhöfe, Flughäfen, Häfen etc. Ein Verkehrsknotenpunkt zeichnet sich darüber hinaus dadurch aus, dass er einen Umsteigeort zwischen den verschiedenen Verkehrsmitteln darstellt."

It's a transportation hub. If you use the word "traffic", you're implying that only automobile traffic is involved.