California DMV Cheat Sheet

A condensed study guide for the CA DMV written knowledge test — test logistics, plus the California-specific rules most likely to differ from what you already know. This isn't a substitute for theofficial California driver's manual, or for practicing the real questions.

46Questions

83%To Pass

$46Fee

3Attempts

Test length varies: 46 questions for provisional (under-18, first-license) applicants; 36 for adult original applicants; 18 for renewals.
Fee: Non-refundable — same fee for an original application and a renewal.
Documents required:
- Proof of identity
- Two proofs of California residency (exceptions may apply)
- A legal name document, if your name doesn't match your ID
- Social security number (exceptions may apply)
If you don't pass: 3 attempts allowed before you must reapply. Minors must wait 7 days (not counting the day of the failed attempt) before retaking a failed knowledge test.
Online testing: Original and provisional applicants must test in person. Renewal applicants may instead complete a no-fail, self-paced eLearning course.

California-Specific Rules

Minor & Provisional Licensing

Instruction permit: minimum age 15½ for applicants under 18.
Behind-the-wheel drive test: minimum age 16, and the permit must have been held at least 6 months (or you've turned 18).
Required supervised practice: at least 50 hours total, including 10 hours at night.
The supervising driver during permit practice must be at least 25 (or a certified instructor) — not just any licensed adult.
Provisional curfew: no driving 11 p.m.–5 a.m. during the first 12 months of licensure.
Provisional passenger rule: no passengers under 20 during the first 12 months, unless a parent, guardian, or other licensed adult 25+ is in the car.

DUI Laws & Penalties

Standard adult DUI threshold: 0.08% BAC.
"Zero tolerance" threshold for drivers under 21: 0.01% BAC — not a literal 0.00%.
Any driver on DUI probation, regardless of age, is held to the same 0.01% BAC threshold.
Separate administrative threshold: a preliminary alcohol screening (PAS) or later test showing 0.05% BAC can suspend an under-21 driver's license.
Administrative Per Se law: DMV suspends your license on arrest, on a track separate from the criminal case.
An officer who takes your license after a DUI arrest issues a temporary license valid for 30 days.
You have 10 days from a DUI arrest to request a DMV administrative hearing.
First DUI conviction: complete a DUI program, file an SR-22/SR-1P proof of financial responsibility; license suspended one year (not permanent); an ignition interlock device may be required on your vehicle.
DUI convictions stay on your driving record for 10 years.

Speed, Right-of-Way & Legal Rules

SR-1 accident report: file within 10 days if a collision causes injury, death, or over $1,000 in property damage — regardless of fault.
Railroad crossing with no working warning devices and your view blocked 400 feet in either direction: 15 mph for the last 100 feet before the crossing.
Ideal maximum speed on most California highways: 65 mph under good conditions.
55 mph applies on two-lane undivided highways and for any vehicle towing a trailer — even where a higher limit is posted.
Blind intersections (no stop/yield/signal at any corner, obstructed view): 15 mph unless posted otherwise.
Alleys: 15 mph default speed limit.
An "alley" is legally defined as any road no wider than 25 feet.
"Safety Enhanced–Double Fine Zones" are road segments with a history of collision-related injuries/fatalities where moving-violation fines are doubled.

Parking Rules & Technique

Green curb: park for a limited time, as posted on a sign or painted on the curb.
Yellow curb: load/unload passengers and freight; a noncommercial vehicle must generally stay with the car.
Red curb: no stopping, standing, or parking — except buses at a marked bus zone.
Blue curb: reserved for a vehicle displaying a disabled person's placard/plate, or transporting that person.
No parking within 15 feet of a fire hydrant or fire station driveway.
No parking within 20 feet of a crosswalk (15 feet where a curb extension/bulb-out is present).
No parking within 3 feet of a sidewalk wheelchair ramp.
Zero-emission-vehicle-designated parking/fueling spaces are off-limits to any non-ZEV.
No parking in a tunnel or on a bridge, unless a sign specifically permits it.

Emergency Vehicles, School Buses & Work Zones

Passing a stopped school bus with red lights flashing: a fine up to $1,000, plus a possible license suspension of up to one year.
Fines are doubled in highway construction/maintenance zones whenever workers are present.

Child Passenger Safety

Under 8 years old OR under 4'9" tall: must ride in a rear seat, secured in a child passenger restraint system.
8+ years old OR 4'9"+ tall: may use a properly secured seatbelt meeting federal standards.

Universal Driving Rules

These apply everywhere, not just California — a general refresher, secondary to the California-specific rules above.

Traffic Signs & Signals

A single broken white or yellow line means you may pass or change lanes when it's safe and won't interfere with traffic.
A red-and-white triangular YIELD sign means slow down and be ready to stop for traffic and pedestrians already in or approaching the intersection.
The standard hand signal for stopping is your left arm and hand extended straight down.
White arrows painted in a lane show which direction that lane must go — for example, straight-only or right-turn-only.

Road Hazards & Construction

A drawbridge is a mechanical bridge that raises or turns to let boat traffic pass, then lowers again for vehicles.
Orange signs and cones on the road mean a work zone is ahead — slow down and be ready for workers, equipment, or a lane shift.

Defensive Driving

Mirrors alone can't cover your blind spots — turn your head and glance over your shoulder before changing lanes.
If a crash is unavoidable, steer toward something that will give way (like bushes) rather than a rigid object like a tree or pole.
Look 10-15 seconds ahead of your vehicle so you can react smoothly instead of making sudden last-second moves.
Large trucks have bigger blind spots than passenger vehicles — give them extra space.

Intersections and Turns

It's illegal to enter an intersection, even on green, unless there's enough space on the other side to get all the way through.
Signal continuously for at least 100 feet before making a turn.
Entering traffic from a stop, you need a gap large enough to accelerate up to the speed of traffic before merging in.
Waiting in an intersection to turn left, keep your wheels straight until you actually turn — angled wheels can push you into oncoming traffic if hit from behind.

Passing

On most two-lane roads, passing means briefly using the oncoming lane — only when you can see it's clear far enough ahead.
When passing a bicyclist, move as far left within your lane (or into the next lane, if legal) as you safely can.
Don't assume a driver you're passing will slow down for you — wait until you can see their whole vehicle in your mirror before pulling back in.
You may pass on the right if the vehicle ahead is waiting to turn left.

Highway & Freeway Driving

Merge onto a freeway at or near the same speed as the traffic already on it, not slower.
The four-second rule: pick a fixed point the car ahead passes, and count at least four seconds before you reach the same point.
If you miss your exit, continue to the next one — never back up or cut across the median.
A U-turn in a residential district is legal if you can complete it safely, with no vehicles approaching close enough to be a hazard.

Pedestrians, Bicyclists & Children

A white cane or guide dog means the pedestrian is blind or low-vision — slow down and be ready to stop, since they may not see you.
Where there's no sidewalk, pedestrians should walk facing traffic, as far to the edge of the road as possible.
Approach bicyclists, in-line skaters, and non-motorized scooters with extreme caution — give them room and slow down as you pass.

Vehicle Emergencies & Highway Maneuvers

If an entrance lane is too short to reach highway speed, stop and wait for a large gap in traffic rather than merging too slow.
If a tire blows out, hold the steering wheel firmly and ease off the gas — don't brake hard.
Use an acceleration lane to reach highway speed before blending with traffic, unless a stop/yield sign or signal says otherwise.

Fog, Glare & Night Driving

To reduce glare from oncoming high beams at night, shift your eyes toward the right edge of your lane instead of looking at the lights.
In fog, use low beam headlights — high beams reflect off the fog and reduce visibility further.

Weather & Road Surface Conditions

If your car starts to skid, steer in the direction you want the front wheels to go.
Driving slower reduces hydroplaning risk by giving your tires more chance to channel water away.
Roads are most slippery in the first 10-15 minutes of a rainstorm, before rain washes oil and grime off the pavement.

Trucks, Motorcycles & Slow-Moving Vehicles

The extra space in front of a large truck is there because trucks need much more distance to stop — don't cut into that gap.
If you see an animal on or near the road, slow down and be ready to yield rather than swerving suddenly.
Leave at least 4 seconds of following distance behind a motorcycle — more than the usual car-following gap.
An orange-and-red triangular emblem on the back of a vehicle marks a slow-moving vehicle, like farm equipment.

Vehicle Handling & Road Conditions

Reduce your speed before and during a turn — taking a turn too fast makes the vehicle harder to control.
On slick roads, take turns more slowly than you would on dry pavement.
Signal early — well before you actually change lanes or pass — so other drivers have time to react.
Turn your headlights on in poor visibility, and as routine about a half hour after sunset and before sunrise.

Alcohol and Other Drugs

Your BAC doesn't depend on what kind of alcohol you drink, your body type, or how well you can "hold your liquor."
Combining drugs — including many over-the-counter or prescription medications — with alcohol multiplies impairment and crash risk.
As alcohol builds up in your bloodstream, it slows your reaction time, judgment, and coordination.
Chemical tests (blood, breath, urine, or saliva) are used to measure blood alcohol content.