Use this guide to review the California speed-limit situations that are easy to mix up on a knowledge test: school zones, alleys, blind intersections, residential districts, and certain railroad crossings.
QUICK ANSWER
California DMV lists 25 mph in business or residential districts unless otherwise posted. Within 500 feet of a school, the limit is 25 mph while children are outside or crossing the street, although some school zones may be posted as low as 15 mph. Alleys and qualifying blind intersections are 15 mph. A 15 mph railroad-crossing rule also applies within 100 feet when you cannot see the tracks for 400 feet in both directions, unless the crossing is controlled by gates, a warning signal, or a flagger.
STUDY NOTES
What is the speed limit in a California school zone?
The California Driver’s Handbook states that the speed limit is 25 mph within 500 feet of a school while children are outside or crossing the street. Some school zones may have speed limits as low as 15 mph, so always follow the posted limit when it is lower.
- The 25 mph school-zone rule depends on children being outside or crossing the street.
- Some school zones are posted at 15 mph.
- Watch for children, bicyclists, crossing guards, and stopped school buses.
What is the speed limit in an alley?
DMV defines an alley as a road no wider than 25 feet that provides access to the rear or side entrances of buildings or properties. The speed limit in an alley is 15 mph.
What is the speed limit at a blind intersection?
DMV lists 15 mph for a blind intersection when the intersection has no stop signs at any corner and your view is blocked under the handbook’s conditions. Move slowly forward until you can see.
Business and residential districts
The handbook lists a 25 mph speed limit in business or residential districts unless otherwise posted.
Railroad crossings can have a 15 mph rule
The speed limit is 15 mph within 100 feet of a railroad crossing when you cannot see the tracks for 400 feet in both directions. DMV says you may drive faster than 15 mph if the crossing is controlled by gates, a warning signal, or a flagger.
- Flashing red warning lights at a railroad crossing mean stop and wait.
- Do not proceed until the red lights stop flashing, even if the gate rises.
- Never start across the tracks unless you have enough room to clear them completely.
School-bus lights are a separate safety rule
Yellow school-bus lights warn you to slow down and prepare to stop. When a school bus flashes red lights, vehicles generally must stop from either direction and remain stopped while the red lights flash. DMV lists an exception when the bus is on the other side of a divided or multilane highway with two or more lanes in each direction.
Posted speed is not always a safe speed
DMV tells drivers to slow down in heavy traffic or bad weather. A posted speed limit does not mean that speed is safe under every condition.
PRACTICE CHECKS
Check your understanding
Answer each question before opening the explanation.
1. What is the speed limit within 500 feet of a school while children are outside or crossing the street?
Show answer
Answer: 25 mph, unless a lower school-zone limit is posted.
DMV lists 25 mph in this situation and notes that some school zones may be as low as 15 mph.
2. What is the speed limit in a California alley?
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Answer: 15 mph.
The California Driver’s Handbook lists 15 mph for alleys.
3. What is the speed limit at a qualifying blind intersection?
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Answer: 15 mph.
DMV lists 15 mph when the intersection meets its blind-intersection conditions.
4. What is the speed limit in a business or residential district unless otherwise posted?
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Answer: 25 mph.
The handbook lists 25 mph in business or residential districts unless another speed is posted.
5. When does the 15 mph railroad-crossing rule apply?
Show answer
Answer: Within 100 feet when you cannot see the tracks for 400 feet in both directions, unless the crossing is controlled by gates, a warning signal, or a flagger.
That is the conditional railroad-crossing speed rule stated in the California Driver’s Handbook.
FAQ
Common questions
What is the speed limit in a school zone in California?
DMV states 25 mph within 500 feet of a school while children are outside or crossing the street. Some school zones may be posted as low as 15 mph.
What is the speed limit in an alley in California?
15 mph.
What is the speed limit at a blind intersection in California?
DMV lists 15 mph when the intersection meets the handbook’s blind-intersection conditions.
What is the speed limit in a California residential district?
The California Driver’s Handbook lists 25 mph in business or residential districts unless otherwise posted.
Is the speed limit always 15 mph near railroad tracks?
No. DMV’s 15 mph railroad-crossing rule applies within 100 feet when you cannot see the tracks for 400 feet in both directions, unless the crossing is controlled by gates, a warning signal, or a flagger.
Do I always stop for a school bus with flashing red lights?
Generally, traffic in both directions must stop while the red lights flash. DMV says you do not need to stop when the bus is on the other side of a divided or multilane highway with two or more lanes in each direction.
VERIFY THE RULE
Official source
This study page was reviewed against the DMV material below. Open the source when you want the complete rule, exceptions, or surrounding context.
Last reviewed: September 26, 2026 · Reviewed by Master My Test