Signal P231 in Dresden Hbf, showing Hp0 (halt). The signal can also show speed restrictions and give a departure order. In foreground you see the signal So8 (the "H" sign), marking the point where the beginning of the train should stop. Near the floor you can see a Lf1 signal, announcing a temporary 30 km/h speed restriction due to construction works. 2001-06-22.

photo: tobias b köhler