What is the appropriate speed when driving in a residential area unless otherwise posted?

In residential areas, the appropriate speed limit is typically set at 25 mph unless a different limit is posted. This speed is intended to enhance safety for pedestrians, cyclists, and children who may be playing or walking near the roadway. Lowering the speed limit to 25 mph allows drivers more time to react to unexpected situations, such as a child darting into the street or a parked car door suddenly opening. Additionally, the reduced speed helps mitigate the severity of collisions in the event that an accident does occur.

Higher speeds, such as 30 mph or 35 mph, may be considered too fast in residential neighborhoods, where the risk of accidents involving pedestrians and other road users is greater. The choice of 15 mph is generally seen in even more controlled environments, like school zones during specific hours, rather than as a general residential speed limit.