The western exit signals of track 3 and 4 in the new overtaking station Dorsfeld (on Cologne-Aachen), seen on 2 February 2002. Both are pure main signals of the Ks system and have a Zs3 (speed indicator). At signal N4 the Zs3 is used for all exits, at signal N3 only for those who change onto the right track. Note that the signal N4 has an additional indicator below the signal head, at the place where a Zs3v usually is attached at a combined signal. I think this might be a Zs6 indicating an exit onto the left track, at least i did not see any other indicator behind the signal that could be the Zs6. But why does signal N3 seem to have no Zs6? Maybe it is integrated into the Zs3, as the exit onto the left track is straight, Zs3 and Zs6 are never needed at the same time.

Digital photo by Christoph Schmitz