What vehicle, building or other is missing from CLOD?

[Igo kyu]

For me, what is most missing is railway cuttings and embankments and the like. In Britain, the age of the train was the 1850s, after that, the bridges were already up, the embankments were already built, the tunnels were already tunnelled. Signal boxes were frequent, now they are rarer because modern ones control longer stretches of track, and there were signals all over the place.