The real Iowa knowledge test is the DMV exam used for a learner permit. This page contains one fixed 20 question slice of the full free 180 question bank, with an explanation after each answer.
Sample question from test 9
signals-markings
On a reversible lane, what does a green arrow above the lane permit?
- Using the lane beneath the arrow
- Entering the lane only to park
- Driving against the indicated direction
- Treating the lane as closed until a red X appears
Answer: Using the lane beneath the arrow. A green arrow over a reversible lane authorizes traffic to use the lane beneath it. The parking option invents a purpose that the signal does not grant, while driving against the indicated direction defeats the lane control. Waiting for a red X before entering also reverses the signal's meaning. Check the overhead display before moving into a lane that changes direction at different times. Remember the paired cue: green arrow means use, red X means stay out, and a flashing yellow X limits the lane to turning.