What is the standard speed limit in a residential area unless otherwise posted?

Answer: B — 25 miles per hour

The standard speed limit in a residential area, unless otherwise posted, is 25 miles per hour. This speed limit is established to enhance safety in neighborhoods where pedestrians, children playing, and cyclists are commonly present. Lowering speed limits in these areas helps to reduce the likelihood of accidents and lets drivers have more reaction time in case of unexpected obstacles, such as a child running into the street. In many states, this limit applies to residential roads to encourage responsible driving behavior in places where people live and walk. While higher speeds may be permissible on major roads or highways, residential areas require a more cautious approach to protect community members.