California expanded its move-over rule in 2026; a school-zone change waits until 2031

The move-over expansion is in effect

The California DMV announced on December 26, 2025, that AB 390 would expand the “Slow Down, Move Over” requirement beginning January 1, 2026. Drivers approaching a stationary vehicle must slow down and move over; the expanded coverage includes marked highway maintenance vehicles and vehicles displaying flashing hazard lights or another warning device. [1]

For people who drive to work, the change is relevant when they encounter a stopped vehicle along the road. The DMV’s announcement describes the expanded coverage but does not address every traffic situation. Drivers still need to account for the conditions around them when responding. [1]

A school-zone limit changes later

The same announcement says AB 382 will lower the school-zone speed limit from 25 mph to 20 mph beginning January 1, 2031. That scheduled change is separate from AB 390, which took effect at the start of 2026. [1]

The two dates matter for drivers preparing for work travel: the move-over expansion applies from 2026, while the lower school-zone limit is scheduled five years later. [1]

Rules matter beyond the knowledge test

The DMV says knowledge-test questions are based on the California Driver’s Handbook. Its preparation page also explains that first-time applicants must pass a behind-the-wheel evaluation, which assesses safe vehicle operation and applying traffic laws in real situations. Those requirements make road rules relevant both to test preparation and everyday trips; the DMV’s announcement does not specify whether either new law will appear as a test question. [2] [1]