In 1939 the Romanian National Rail Company started the construction of civilian vaults.

In 1939 the Romanian National Rail Company started the construction of civilian vaults, in preparation for WWII. Dioramas and scale models were displayed publicly the same year in the National Railway Museum. Those vaults varied from residential ones to specialized ones like: infirmaries, command offices, etc. A 1:1 scale of a railway command office vault was built inside the said museum. All the vaults had power generators, air filtration, water tanks, dry toilets, glow-in the dark signs, communication systems, etc.