California speed laws come in four types, and knowing which one applies to your situation decides whether you have a defense. The Basic Speed Law requires a safe speed for conditions. Prima facie limits set presumed-safe speeds you can rebut in court. Absolute limits are hard ceilings with no conditions defense. The Minimum Speed Law makes driving too slowly its own violation. One mile per hour over an absolute limit is a violation; the same overage in a prima facie zone can be defended if conditions made your speed safe.
The Basic Speed Law
Vehicle Code 22350 requires every driver to travel at a speed that is reasonable and safe for current conditions, no matter what the posted limit says.1California Legislative Information. California Code VEH Section 22350 Weather, visibility, road surface, traffic density, and pedestrian activity all factor in. You can be cited under this law while driving below the posted limit. Doing 55 on a freeway in dense fog when everyone else has slowed to 35 is the classic example.
This law operates as an overlay on every other speed rule. Even if you are under both the posted number and the absolute maximum, a prosecutor can still argue the speed was unsafe for what you faced. Construction zones, heavy rain, blind curves, and crowded school pickup lines are where it bites hardest. The question an officer or judge asks is simple: given everything happening around you, was that speed safe?
Prima Facie Speed Limits
“Prima facie” means “on its face.” These are speeds the law presumes are safe for certain types of locations under Vehicle Code 22352, and they apply automatically even where no sign is posted.2California Legislative Information. California Code VEH Section 22352 The key feature is that they are rebuttable. If you were doing 32 in a 25 mph residential zone and can show conditions made that speed safe — light traffic, clear visibility, wide road — a court can find you not guilty. You carry the burden of proof, and judges are skeptical, but the defense exists.
25 MPH Zones
A prima facie limit of 25 mph applies in business districts, residential districts, and school zones when children are present.2California Legislative Information. California Code VEH Section 22352 It also applies near senior centers posted with a standard “SENIOR” warning sign. In school zones, the restricted area extends 500 feet from school grounds in any direction, and local authorities can establish these zones with signage under Vehicle Code 22362.
15 MPH Zones
The prima facie limit drops to 15 mph in three narrow situations: driving through an alley, entering an uncontrolled intersection where you cannot see oncoming traffic for at least 100 feet in either direction, and approaching a railroad crossing where your view of the tracks is blocked and you cannot see at least 400 feet in both directions.2California Legislative Information. California Code VEH Section 22352 These zones rarely have signs. The law expects you to recognize the situation and slow down on your own.
Absolute Speed Limits
Absolute limits are ceilings you cannot legally exceed no matter what. There is no “conditions were safe” defense. The prosecution only needs to prove you were going faster than the posted number.
Vehicle Code 22349 sets a statewide maximum of 65 mph on most highways. On two-lane undivided highways — roads with one through lane in each direction — the absolute maximum drops to 55 mph unless Caltrans has posted a higher limit based on an engineering survey.3California Legislative Information. California Code VEH 22349 Passing lanes do not count when determining whether a road qualifies as two-lane.
On certain freeway segments, Caltrans can raise the absolute maximum to 70 mph after a traffic engineering survey and approval from the California Highway Patrol. These stretches are always marked. If you do not see a 70 mph sign, the 65 mph ceiling applies.4California Legislative Information. California Code VEH 22356 The 70 mph limit specifically excludes trucks and vehicles towing trailers.
The Minimum Speed Law
California also penalizes going too slow. Vehicle Code 22400 makes it illegal to drive so slowly that you block or impede the normal flow of traffic, and it prohibits stopping on a highway in a way that blocks traffic unless the stop is necessary for safety or required by law.5California Legislative Information. California Code VEH Section 22400
Two exceptions apply: you can drive slowly if the reduced speed is necessary for safe operation, such as on a steep grade, or if you are complying with another traffic law. Cruising at 40 in the left lane of a freeway posted at 65 with light traffic is a textbook violation. The speed differential invites rear-end collisions and forces other drivers to swerve around you.
A companion rule reinforces the principle. Vehicle Code 21654 requires any vehicle traveling below the normal speed of surrounding traffic to stay in the right lane or as close to the right edge as practical, with exceptions for passing and preparing for a left turn.6California Legislative Information. California Code VEH Section 21654 Sitting in any other lane while going slower than the flow is treated as evidence of a violation.
Trucks and Vehicles Towing Trailers
Vehicle Code 22406 imposes a separate 55 mph ceiling on specific vehicles regardless of the posted limit: multi-axle trucks, any truck or passenger vehicle towing another vehicle, school buses carrying students, and farm labor vehicles carrying passengers.7California Legislative Information. California Code VEH 22406 Even on a freeway posted at 70, these vehicles are capped at 55. The 70 mph freeway limit explicitly does not apply to vehicles subject to Section 22406.4California Legislative Information. California Code VEH 22356
This catches recreational drivers off guard. If you are towing a boat, a travel trailer, or a car on a dolly behind your SUV, your maximum drops to 55 anywhere in California. Plenty of drivers pulling trailers keep pace with traffic at 65 or 70 without realizing they are in violation.
Speeds Over 100 MPH
Vehicle Code 22348(b) treats speeds above 100 mph as their own category. A first offense carries a fine of up to $500 and a possible 30-day license suspension. A second conviction within three years raises the maximum fine to $750 and makes the suspension mandatory. A third within five years pushes the fine ceiling to $1,000. A conviction at 100 mph or above puts two points on your driving record instead of one.8California Legislative Information. California Code VEH 12810
Fines, Points, and What a Conviction Costs
Base fines set by statute look manageable: $35 for 1 to 15 mph over, $70 for 16 to 25 mph over, and between $100 and $200 for anything higher. State and county penalty assessments, a court security fee, a conviction assessment, and various surcharges then multiply the amount you actually pay. A $35 base fine ends up costing roughly $230. Higher-tier tickets can reach $400 to $500. The multipliers are not discretionary and judges do not waive them.
Most speeding violations add one point to your California driving record; speeds over 100 mph add two.8California Legislative Information. California Code VEH 12810 Reach four points in 12 months, six in 24 months, or eight in 36 months and the DMV designates you a negligent operator. That triggers a one-year probation period that includes a six-month license suspension.9California DMV. Negligent Operator Actions Insurance carriers also react. A single speeding conviction typically raises premiums by around 25 percent, and the increase lasts several years.
Traffic School
For most speeding tickets, attending a state-licensed traffic school keeps the point off your public driving record. Eligibility requires a valid driver’s license, a ticket for a noncommercial vehicle, and no traffic school attendance in the previous 18 months.10California Courts. Traffic School Tickets involving alcohol or drugs do not qualify. Commercial license holders should check with the court handling the case, because the rules differ. You still pay the fine, but masking the point is usually worth it for the insurance savings alone.
Out-of-State Drivers
A California ticket does not stay in California. Under the Driver License Compact, California reports your conviction to your home state’s DMV, which then treats the offense as if you committed it there and applies its own point system and consequences.