When following a road sign with a green filter arrow, you should:

• A. Only if you are going in the direction of the arrow.
• B. Always in any direction.
• C. Only when turning left.
• D. Only when the road ahead is clear.

Answer: (A)

A green filter arrow shows a lane where you may proceed only in the direction of the arrow. If you’re in that lane, you should turn in that direction and not go straight or the other way from that lane. If you’re not turning in that direction, stay in your current lane or use the appropriate lane for your intended movement. So the best answer is that you proceed only if you are going in the direction shown by the arrow. The other options would let you go in directions the filter lane isn’t for, or rely on conditions (like the road ahead being clear) that don’t determine what the arrow permits.