IA Intersections
You are stopped at a green left turn arrow in Iowa. The arrow turns to a steady green ball. What does the new signal mean?
- Continue your protected left turn at any time
- You may still turn left but must yield to oncoming traffic and pedestrians ✓
- Left turns are now prohibited and you must go straight
- Stop and wait for the next protected arrow
The answer explained
A green arrow is a protected turn. Oncoming traffic is stopped. When the signal changes to a steady green ball, the protection is gone. You may still turn left in Iowa, but you must yield to oncoming traffic that has the same green ball and to any pedestrians lawfully in the crosswalk. Move into the intersection, keep your wheels straight while waiting, and complete the turn when a safe gap appears.
Why this rule exists
Left turns across opposing traffic are the highest risk routine maneuver a driver makes. Treating the green ball as if it were still protected is a leading cause of front to side crashes at signalized intersections.
The most common mistake
Drivers turn their wheels left while waiting in the intersection. If they are rear ended their car is pushed into oncoming traffic. Keep wheels straight until the moment you actually turn.
Iowa specific note
Iowa is one of the few states where the knowledge test can be taken at participating high schools. For this question in particular, the Iowa Department of Transportation aligns with the standard interpretation explained above. Always verify against the most recent Iowa driver handbook before relying on these details for the live exam.
Study tip
Arrow means protected, ball means permitted. Permitted always requires yielding before you turn.
Related questions for Iowa
- You are driving in Iowa and you approach a red octagonal sign at an intersection. What is required of you?
- While driving on a rural road in Iowa you see a yellow diamond shaped sign with a curved arrow and the number 35. What does it mean?
- You are driving on an interstate in Iowa and see a large green sign overhead listing the next exit and a destination city. What kind of sign is this?
- You arrive at a four way stop in Iowa at the same time as another vehicle on your right. Who has the right of way?
- What is the typical maximum posted speed limit on a rural interstate highway in Iowa?
- In Iowa how close are you allowed to park to a fire hydrant?