What is the speed limit in residential areas in Arizona unless otherwise posted?

Answer: C — 25 miles per hour

In Arizona, the speed limit in residential areas is set at 25 miles per hour unless otherwise posted. This speed limit is established to ensure the safety of residents, particularly children and pedestrians who may be present in these neighborhoods. Slower speeds in residential zones help reduce the severity of accidents and provide drivers with more reaction time to respond to unexpected situations, such as a child running into the street or a parked vehicle door opening. Understanding this standard is crucial for new drivers, as it highlights the importance of adjusting speed according to the environment and recognizing that residential areas typically have more hazards due to the proximity of homes and community activities.