What does a lane control signal with a green arrow above a reversible lane indicate?
- The signal is about to change to a red X.
- Drivers should not drive in this lane.
- Drivers may use this lane only to make a left turn.
- Drivers may drive normally in this lane. ✓
Answer: D. Drivers may drive normally in this lane.
A green arrow above a reversible lane means drivers may drive normally in that lane.
Why this is the answer
The handbook describes lane-use control signals as overhead signals that tell you whether you may drive in a particular lane. It says a steady downward green arrow means you are permitted to drive in the lane under the arrow. That makes the green arrow a permission signal, not a warning to leave the lane and not a left-turn-only instruction. The red X is the signal that tells you not to drive in that lane, and a yellow X tells you to prepare to leave it. So with a green arrow, normal use of the lane is allowed.
Why the other answers are wrong
- A. The signal is about to change to a red X. — A green arrow is a permission signal, while the handbook says a yellow X means prepare to leave the lane because a lane control change is being made, so it does not mean the signal is about to turn to a red X.
- B. Drivers should not drive in this lane. — The red X above a lane is what tells drivers not to drive there; the green arrow gives permission to drive in the lane instead.
- C. Drivers may use this lane only to make a left turn. — The green arrow permits driving in the lane generally; the handbook does not describe it as a left-turn-only signal.
Remember it
Green arrow means the lane is open; red X means stay out.
Official handbook: Texas Driver Handbook (DL-7), Chapter 5: Signals, Signs, and Markers , p. 32