In a tunnel with one lane in each direction, is overtaking allowed?
A)Yes, when there are no signs prohibiting it.
B)No.Correct
C)Yes, if there is sufficient visibility.
In tunnels or underpasses with two-way traffic, overtaking is prohibited, unless there is more than one lane in your direction of travel, in which case you may overtake without crossing into the opposite direction. On the other hand, overtaking is always prohibited in tunnels, underpasses and stretches of road affected by the "Tunnel" sign in which only one lane is available for the direction of travel of the vehicle intending to overtake.