A badger tunnel under a motorway in the Netherlands
Note that the badgers are kept off the motorway by the use of
so-called badger-proof fencing.
In reality, fencing like this provides a good deterrent to stop
badgers getting on to the road, but it is not badger proof as badgers
can climb the fence.
To help badgers who get on to the road, get back to safety, there
will also be several one-way gates which allow the badgers to get from
the motorway to the fields, but not vice versa.
Note too the use of soakaways to help prevent the
tunnel from becoming water-logged.The risk of flooding is
two-fold: firstly from heavy rain filling the tunnel or its
entrances or secondly foul-water run off from the road surface.