High barbed cable fences preventing access beneath each major connection.
And guard houses at each tunnel portal.
I stumbled upon A russian railfan forum, where in fact the basis for these protection measures had been raised.
VeschiiOleg published: as an example, the method of any severe connection is enclosed with a zone of alienation with barbed cable, indications and armed guards.
Vlad wrote: We photograph the railway connection, for instance. The ВОХРовец is approaching us and politely is interested, but on which foundation are you currently using these pictures?
VeschiiOleg composed: ВОХРовец, in accordance with the statute of this guard service they don’t have legal rights to go out of the center, those due to the territory he must not keep. But to call the police – easily. And then they will be right if on the fence, there are inscriptions about the prohibition of filming.
What exactly will be the ВОХРовец? It’s an abbreviation for Военизированная охрана – also known as Ведомственная охрана, Russian-language Wikipedia defines them since: