In Portuguese traffic regulations, how are lanes designated as reversible (vias de sentido reversível) controlled?
Answer and explanation
Correct answer: C. By overhead lane-control signals showing a green downward arrow or a red diagonal cross
- Step 1: Reversible lane control systems. Step 2. Reversible lanes are managed by overhead illuminated lane signals (sinais de afetação de vias): a green downward arrow indicates the lane is open, while a red 'X' indicates it is closed or oncoming. Answer: By overhead lane-control signals showing a green downward arrow or a red diagonal cross. Why not the others: Flags, radio stations, and ten-kilometer painted signs are not standard traffic control mechanisms.
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