What is the speed limit in residential zones unless posted otherwise?

In California, the standard speed limit in residential zones is set at 25 miles per hour unless otherwise posted. This regulation is established to enhance safety for pedestrians, cyclists, and motorists alike, especially because residential areas often have children playing and pedestrians walking in the vicinity. This speed limit is designed to allow drivers sufficient time to react to unexpected situations, such as a child running into the street or a parked vehicle suddenly opening its door.

While there are varying speed limits for different types of roads and conditions, the 25 mph limit in residential areas serves as a guideline to promote safer driving behavior. It's important for drivers to be aware of these limits, as they are expected to adjust their speed accordingly to maintain safety for everyone on the road.