That’s a wildlife bridge in progress. It allows wild animals to cross the highway without getting run over.
These are super important for wildlife like mountain lions and bears
What about tigers?
Not where this bridge is built. This looks like a German autobahn, so the closest thing to a tiger crossing that is either a lynx or a fox.

Tigers exist natively is so few places, the question itself makes little to no sense.

Bengal Tiger == Marshland

Siberian Tiger == Tundra

Asian Tiger == Plateau/Deep Forest

Indonesian/Sumatran Tiger == Coast?Islands?Dense Tropical Jungle?