What is the prima facie speed limit in business or residential districts in California?

In California, the prima facie speed limit in business or residential districts is set at 25 mph. This means that under normal circumstances, drivers are presumed to be exceeding the speed limit if they drive faster than this speed in these areas. The reasoning for this speed limit is primarily related to safety, as residential neighborhoods and business districts typically have higher pedestrian activity, children playing, and other factors that require drivers to be more cautious.

Maintaining a speed limit of 25 mph allows for better reaction times and reduces the severity of accidents that may occur. While it is important for drivers to be aware of posted speed limits, this 25 mph limit serves as a general guideline to promote safer driving in more densely populated areas. Factors such as road conditions, visibility, and the presence of pedestrians can necessitate even lower speeds, reinforcing the importance of driving at a speed that is safe for the conditions, even if it is below the established limit.