Updated · Sign codes from the California MUTCD; what they mean from the California Driver’s Handbook and Vehicle Code.

Road sign: School speed limit 25 (SR4-1(CA))
US road sign SR4-1(CA) · school signs

School speed limit 25

California MUTCD, sign SR4-1(CA)
In short

What does the School speed limit 25 sign mean?

25 mph near the school while children are present (CVC 22352).

How school signs work

They mark a school, its crosswalks and its speed limit. School warning signs have a fluorescent yellow-green background with a black legend and border (California MUTCD, section 7B.01).

Learn it by driving

More school signs

School (S1-1)
S1-1School
School crosswalk (SW24-2(CA))
SW24-2(CA)School crosswalk