When can you legally turn right on red in Iowa?

The correct answer is that you can legally turn right on red after coming to a complete stop and ensuring the way is clear. This rule is in place to prioritize safety at intersections. Before making a right turn on red, it's essential for drivers to observe all traffic laws, including stopping at the red light, checking for oncoming traffic, and ensuring that there are no pedestrians crossing the intersection. This process helps to prevent accidents and ensures that the rights of pedestrians and other road users are respected.

The other options address related considerations but do not encapsulate the full requirement for a legal right turn on red. While a sign permitting the turn is relevant, the fundamental legal requirement to stop and check the roadway is more critical. Pedestrian presence is also a factor to consider, but it falls under the broader rule of ensuring the intersection is clear. Lastly, while drivers may recall instances of turning right on red at any time during the day, the law specifically requires the prior actions of stopping and checking; hence, time of day alone does not dictate legality.