Due to road works (obras), traffic is diverted into a temporary lane in the opposite direction to the usual one. Which vehicles are permitted to use it?
A)Only passenger cars without trailers and motorcycles.
B)All vehicles, unless otherwise prohibited by specific road signs.Correct
C)Only heavy trucks and construction vehicles.
D)No vehicles are allowed; it is strictly reserved for emergency services.
The Trap: Candidates often memorize the "passenger cars and motorcycles only" rule from the traffic flow scenario and blindly apply it to all opposite-direction lanes.
The Reality: When the lane is enabled due to road works (por motivo de obras en la calzada), it is usually because the normal side of the highway is physically blocked or closed. Because of this necessity, all vehicles that are legally allowed to drive on that road have the right to use the temporary opposite-direction lane, unless a specific vertical sign explicitly prohibits certain categories (like heavy trucks).