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

Road sign: School (S1-1)
US road sign S1-1 · school signs

School

California MUTCD, sign S1-1
In short

What does the School sign mean?

A school is near: watch for children and be ready to stop.

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).

More school signs

School speed limit 25 (SR4-1(CA))
SR4-1(CA)School speed limit 25
School crosswalk (SW24-2(CA))
SW24-2(CA)School crosswalk