Fresno becomes first CA city to reduce school zone speed limits to 20mphThe City of Fresno is taking a major step in making school zones safer for students and drivers by reducing the speed limit. The City of Fresno is taking a major step in making school zones safer for students and drivers by reducing the speed limit. The City of Fresno is taking a major step in making school zones safer for students and drivers by reducing the speed limit. FRESNO, Calif. (KFSN) -- The City of Fresno is taking a major step in making school zones safer for students and drivers by reducing the speed limit. Fresno City Mayor Jerry Dyer and City Council President Nelson Esparza announced on Wednesday morning a speed limit reduction to school zones across the city.