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Most-missed Arizona DMV rules
These are the numbers and rules that trip up new drivers most often on the real Arizona knowledge test. Every fact below comes from our free Arizona DMV practice test question bank, which has 180 questions across 9 topics.
Speed limits
- Arizona doubles fines for speeding and other violations committed within designated work zones to protect workers.
- ARS 28-701 sets the presumptive limit at 25 mph in a business or residential district.
- ARS 28-701 sets the prima facie limit at 65 mph in other, non-posted locations.
- ARS 28-701 sets the limit approaching a school crossing at 15 mph.
- Exceeding 85 mph anywhere is one of the triggers for a class 3 misdemeanor excessive speeding charge under ARS 28-701.02.
Right of way
- At an uncontrolled T-intersection, the vehicle traveling on the continuous through street has the right-of-way over traffic on the street that ends.
- Vehicles entering a freeway or highway must yield to traffic already traveling on it.
- Traffic already circulating in a roundabout has the right-of-way; entering vehicles must yield, including yielding to large trucks that are entering.
- Arizona law grants pedestrians the right-of-way at any crosswalk, whether it is marked with paint or simply the unmarked extension of a sidewalk across a street.
- Funeral processions with a lighted escort vehicle have the right-of-way, and other drivers must yield to them, though stopping is not a strict legal requirement.
- General right-of-way rules give priority to the vehicle on the right when two vehicles reach an uncontrolled or equally controlled intersection at the same time.
- At multi-way stops, the basic right-of-way principle is that the first vehicle to arrive and stop proceeds first, with right-of-way to the right used to break simultaneous arrivals.
- A vehicle on a through road with no stop sign has the right-of-way over traffic that must stop before entering, since the crossing vehicle is required to yield.
- Drivers turning left must yield the right-of-way to oncoming vehicles, bicycles, and pedestrians before completing the turn.
- Pedestrians have the right-of-way in any marked or unmarked crosswalk, so drivers must yield to them.
- Do not cut through or break up a funeral procession. Slow down, be patient, and let it pass. Cutting between the vehicles is unsafe and often illegal.
- At an uncontrolled intersection, slow down and yield to any car already in the intersection or approaching from your right.
- A left-turning vehicle must yield to oncoming through traffic and to pedestrians. Only turn when the gap is safe.
- When entering a roundabout, yield to traffic already circulating and travel counterclockwise. Exit at your street; do not stop in the middle of the circle.
- At a T-intersection, traffic on the road that ends must yield to traffic on the through road that continues.
- A round green light allows a left turn but does not give you the right of way. Pull into the intersection, yield to oncoming through traffic and pedestrians, then turn when there is a safe gap.
Alcohol and DUI
- Arizona's per se DUI threshold for regular drivers is 0.08% BAC or above, though the manual notes you can be convicted even below that if impairment is proven.
- Commercial drivers face a stricter 0.04% BAC threshold, half the standard limit for non-commercial drivers.
- Zero-Tolerance sets no numeric threshold for minors; any measurable trace of alcohol, marijuana, or an impairing drug can result in suspension.
- The manual explicitly warns that impairment can be proven and result in a DUI conviction at levels below 0.08% BAC.
- Extreme DUI in Arizona covers the 0.15% to 0.19% BAC range, triggering escalated mandatory minimum penalties beyond a standard DUI.
- Aggravating factors like driving with a suspended license, a third DUI within seven years, or having a minor under 15 in the vehicle can elevate a charge to Aggravated DUI status with harsher mandatory jail terms.
- A first-offense DUI in Arizona is a class 1 misdemeanor with a mandatory minimum of 10 consecutive days in jail plus fines and assessments totaling about $1,000.
- A second DUI within 84 months carries a mandatory minimum of 90 days jail with at least 30 consecutive, plus fines, assessments, and a 1-year driving privilege revocation.
- ADOT/MVD imposes a 90 day administrative suspension for a 0.08+ BAC test, with restricted permit eligibility after the first 30 days.
- A first refusal of a chemical test under Arizona's implied consent law results in a 12-month license suspension; a second refusal within 84 months results in 24 months.
Signals and markings
- Drivers are expected to signal turns and lane changes well before executing them, giving other road users adequate warning.
- At uncontrolled intersections, drivers must yield to vehicles that are already in the intersection.
- A solid yellow line on your side of a centerline pair generally means passing is prohibited in that direction, while a broken line permits passing when safe.
- A solid red arrow requires a complete stop and prohibits the turn until the signal changes, unlike a flashing red or green arrow.
- The manual requires dimming high beams for oncoming traffic to avoid blinding other drivers.
- The truck apron is a raised, paved area only meant for large truck wheels; ordinary vehicles should never drive on it.
- Hand signals remain a legally valid backup to electric signals; a straight, extended left arm signals a left turn.
- A steady red signal requires a full stop; any right turn on red is only allowed after stopping and when safe and not prohibited by signage.
- A flashing yellow arrow permits the indicated turn but the driver must first yield to pedestrians and oncoming traffic.
- A flashing red signal requires a full stop, after which the driver may proceed when it's safe, just as at a stop sign.
- A flashing red signal functions like a stop sign, requiring drivers to come to a complete stop before proceeding when safe.
- A solid yellow line on a driver's side of the centerline indicates that passing is prohibited from that side of the road.
- A flashing yellow light warns drivers to slow down and proceed carefully, unlike a flashing red which requires a full stop.
- A flashing yellow signal is a caution indicator, telling drivers to slow down and proceed carefully rather than stop.
- A dashed yellow line means passing is allowed when there is a safe gap in oncoming traffic, unlike a solid yellow line.
- A solid yellow line on your side of the center marking indicates passing is prohibited from that direction due to limited sight distance or other hazards.
- A driver turning left must yield the right-of-way to all oncoming traffic, including bicyclists, before completing the turn.
- Broken white lines between same-direction lanes indicate that changing lanes is allowed when it can be done safely.
- A flashing yellow light means slow down, look, and proceed carefully. It does NOT require a full stop the way a red light or STOP sign does.
- A flashing hand or countdown means do NOT start crossing. If you are already in the crosswalk, keep going and finish crossing safely.
- A steady DON'T WALK hand prohibits starting to cross. Only a WALK signal or walking-person symbol allows you to begin crossing.
- Always signal continuously through a turn or lane change even when you see no other cars, because pedestrians or cyclists may be near. Cancel the signal after you finish.
- A green downward arrow means the lane is open for you to use. A red X above the lane means it is closed and you may not drive in it.
- Double solid yellow lines separate opposing directions and prohibit passing. You may only cross them for a permitted left turn or a legal U-turn into an intersection or driveway.
- A broken yellow line on your side of the lane allows passing when it is safe. The solid line on the opposite side means that direction may not pass.
- White lines separate lanes going the same direction. A solid white line means stay in your lane and avoid changing lanes, while a broken white line lets you change lanes when safe.
- A two-way center left-turn lane is only for preparing to turn left or merging into traffic. You may not use it to drive straight through or to pass.
Parking
- Standard parking rules require vehicles to park parallel with the flow of traffic on that side of the road, not facing oncoming traffic.
Safe driving
- Unlike many states that restrict U-turns to intersections or specific signage, Arizona broadly permits U-turns anywhere not prohibited by signs, provided it can be done safely.
- Arizona explicitly bans passing within a designated school crossing zone outright, even if temporary warning signs aren't currently displayed.
- General safe-driving principles call for maintaining an adequate following distance that increases with speed and worsening conditions to allow safe stopping.
- The manual requires dimming to low beams at least 300 feet before overtaking or following another vehicle.
- Safe driving practice calls for maintaining enough distance behind the vehicle ahead to react and stop safely if it brakes suddenly.
- The manual explains posted limits are for ideal conditions, and driving that speed in bad conditions can still be cited as too fast for conditions.
- Posted speed limits are for ideal conditions; drivers should reduce speed further and increase following distance in poor weather like heavy rain or fog.
- Easing off the gas and holding a straight steering direction allows the tires to regain contact with the road surface safely.
- Drivers in both directions on an undivided road must stop for a school bus with flashing red lights until it is safe to proceed.
- The manual stresses that no one should ever assume they automatically have the right of way, since other drivers may not yield as expected.
- The safe response to a skid is to ease off the gas and steer smoothly in the direction you want to travel, rather than braking hard or overcorrecting.
- The Basic Speed Rule obligates drivers to reduce speed below the posted maximum in hazardous conditions.
- A driver overtaking a bicyclist may not turn right unless it can be completed at a safe distance from the cyclist and at a reasonable, proper speed.
- Since farm tractors typically travel around 25 mph, the speed differential requires extra caution and clearance when passing.
- Drivers must yield to emergency vehicles with active lights and siren by safely moving aside, not stopping in the travel lane.
- Children under 7 must use a child restraint system meeting 49 CFR 571.213 standards unless they are 57 inches or taller.
- Because posted speed limits assume ideal conditions, the handbook advises reducing speed in rain and other hazardous conditions.
- The manual requires yielding to pedestrians, cyclists, and others still clearing the intersection even if you'd otherwise have priority.
- An owner cited by a stop-arm camera faces monetary penalties instead of points: $250 for a first violation, rising to $300 for a third within 18 months.
- Wet roads increase stopping distance, so drivers should slow down and add extra space to compensate for reduced traction.
- With a tailgater, open up more space in front of you so you can brake gradually instead of suddenly. Do not brake to retaliate and do not race away.
- Strong crosswinds can push your car out of its lane. Hold the wheel firmly with both hands, slow down, and be ready for sudden gusts.
- Do not engage. Avoid eye contact, do not brake in retaliation, let them pass, and leave a safe distance between you and that car.
- Horses and livestock spook easily. Slow down, do not honk or rev your engine, and pass very slowly with plenty of room so you do not startle them.
- When you see a hazard developing ahead, cover the brake and plan an escape route so you can react faster if you have to stop.
- In a skid, ease off the gas or brake and steer gently in the direction you want the front of the car to go. Slamming the brakes makes the skid worse.
Road signs
- White signs with black letters are regulatory signs stating the legal maximum enforceable speed limit for that stretch of road.
- Yellow warning signage in this context provides an advisory safe speed recommendation for hazards like curves, distinct from a legally binding limit.
- STOP (R1-1): full stop at the line or crosswalk even when empty; yield, then proceed.
- YIELD (R1-2): give up the right-of-way; slow and be ready to stop.
- DO NOT ENTER (R5-1): entry prohibited; common at freeway off-ramps and one-way streets.
- WRONG WAY (R5-1a): you have entered opposing traffic. Pull over safely and turn around when possible.
- ONE WAY (R6-1): all traffic flows in the arrow's direction.
- NO U-TURN (R3-4): no U-turns at this location. This is not a no-left-turn sign (a different arrow shape) or a no-passing sign (a different shape and color entirely).
- NO LEFT TURN (R3-2). A red circle-and-slash always bans the pictured movement.
- NO RIGHT TURN (R3-1): no right turns, including on red. Going straight is still fine since the sign only bans the right-turn movement; parking is unrelated to this sign.
- White/black = regulatory. Speed Limit is the legal max in ideal conditions; drive slower when conditions are bad (Basic Speed Law).
- KEEP RIGHT (R4-7): a median or obstruction is ahead; keep to its right.
- The crossbuck (R15-1) stands at the tracks and legally works like a YIELD sign: slow, look both ways, be ready to stop.
- Advance warning (W10-1): tracks ahead. Slow down, look, and listen.
- School (S1-1): school zone or crossing. Slow down and watch for children; obey the posted reduced school-zone speed limit, which varies by state.
- Pedestrian crossing (W11-2): crossing ahead; slow and be ready to stop.
- Signal ahead (W3-3): an intersection signal is coming, useful when it hides behind a curve.
- Stop ahead (W3-1): a stop sign is coming (often obscured); start slowing now.
- Merge (W4-1): traffic joins ahead. Adjust speed and position to let them in safely.
- Lane ends (W4-2): merge early; zipper-merge when traffic is heavy.
- Two-way traffic (W6-3): you are leaving a one-way road; keep right.
- Divided highway begins (W6-1): directions separate around a median; always keep right of it.
- Slippery when wet (W8-5): slickest in fresh rain. Slow down, keep distance, steer smoothly.
- Curve (W1-2): slow BEFORE the curve; do not brake in the middle of it.
- Turn (W1-1): sharper than a curve; slow down hard, follow the advisory plaque.
- Winding road (W1-5): consecutive curves; hold a steady lower speed throughout.
- Crossroad (W2-1): an intersection ahead with traffic entering from both sides. Hospital signs are blue with an H.
- NO PASSING ZONE (W14-3): unique pennant shape, posted on the LEFT side, marks where passing becomes illegal.
- At a yield sign, drivers must slow or stop as needed to let crossing or oncoming traffic clear before proceeding safely.
- The railroad advance warning sign is round with an X and R R symbol, one of the only circular warning signs used on US roads.
- An inverted triangle is the standard shape used for yield signs, instructing drivers to slow and give way to other traffic.
- The eight-sided red STOP sign requires a full stop before entering the intersection, regardless of visible cross traffic.
- Warning signs (typically yellow, diamond shaped) inform drivers of hazards ahead like curves or crossings, distinct from regulatory signs that state legal requirements.
- The triangular yield sign shape signals drivers to give the right-of-way as needed to other traffic or pedestrians.
- The handbook's statutory speeds apply only when no other limit is posted, meaning posted signage takes precedence.
- Diamond-shaped yellow signs are warning signs, alerting drivers to hazards or changes in road conditions ahead.
- Diamond-shaped yellow signs are standard warning signs alerting drivers to hazards like curves, merges, or crossings ahead.
- School zone and school crossing signs use a distinctive fluorescent yellow-green pentagon shape to stand out to drivers.
- The circular yellow sign shape is specifically reserved in the national sign system for advance railroad crossing warnings.
- Diamond-shaped yellow signs are warning signs, alerting drivers to hazards like curves, merges, or crossings ahead.
- Yellow diamond signs are standard warning signs alerting drivers to hazards or changing road conditions ahead.
- School zone warning signs signal drivers to reduce speed and watch for children, consistent with the guide's emphasis on adjusting speed for conditions and hazards.
- The triangular shape is uniquely reserved for Yield signs, telling drivers to slow and give way rather than come to a full stop.
- The yellow pennant-shaped sign marks the start of a no-passing zone. It usually appears along with a solid yellow line on the pavement.
- A yellow diamond-shaped sign is a WARNING sign, alerting you to a hazard or change ahead such as a curve, intersection, or school, so you slow down.
- A white rectangular sign with black lettering is a REGULATORY sign stating a law you must obey, such as speed or direction of travel.
- An orange sign marks a construction or roadwork zone. Slow down and watch for workers and shifting lanes.
- A blue sign points to driver services such as gas stations, food, lodging, or hospitals.
- A green sign is a GUIDE sign, showing directions, distances, and the names of exits or places.
- A red circle with a slash means the action shown is PROHIBITED, such as no turn or no U-turn at that spot.
Laws and paperwork
- The Arizona MVD written knowledge test consists of 30 multiple-choice questions.
- Photo enforcement citations in Arizona route through the state court system's Defensive Driving Program option rather than a separate private traffic school system.
- ADOT's Motor Vehicle Division (MVD) publishes the driver manual and administers licensing and written testing statewide.
- Arizona teens may apply for the Class G instruction permit at 15 years 6 months old.
- Teens must be at least 16 years old to obtain the Class G license, and must have held the permit for six months (or until age 18).
- Teens with a new Class G license may not drive between midnight and 5:00 a.m. unless accompanied by a licensed parent/guardian or driving to/from school, work, or religious activity.
- Arizona GDL passenger restrictions limit new Class G drivers to no more than one passenger under 18 unless they are siblings or a licensed parent/guardian is present.
- Class G license holders may not use cell phones or wireless devices while driving except for emergencies or audible navigation.
- The Arizona instruction permit is valid for 12 months total from issuance.
Emergencies
- The "Pull Aside, Stay Alive" protocol requires getting fully off the road, turning off headlights so others don't follow your taillights off the road, and remaining buckled in until conditions clear.
- Other motorists may instinctively follow visible taillights, so turning lights off helps prevent them from steering off the roadway into a stopped vehicle.
- Arizona's manual specifies keeping at least 500 feet behind responding fire apparatus, and 300 feet behind police vehicles.
- If pulling fully off the road isn't immediately possible, drivers should slow down and use extra caution, but the priority is always to get completely off the pavement as soon as safely possible per Pull Aside, Stay Alive guidance.
- Since Arizona's Move Over law includes tow trucks, drivers unable to change lanes safely must slow down and proceed with extra caution.
- ARS 28-775 requires drivers to move over a full lane away if possible, or otherwise reduce speed and proceed with due caution.
- Arizona's Move Over Law sets a $275 penalty for a first violation, escalating to $500 for a second and $1,000 for a third within 5 years.
- The Move Over Law statute mandates that defensive driving and driver education programs include instruction on the move-over requirement, and requires ADOT/MVD to publicize it.
- Rapid brake lights or hazard signals ahead indicate a potential emergency or obstruction, so drivers should slow down and prepare to react safely.
- With a median under 20 feet wide, all lanes in both directions are required to stop for the school bus.
- Drivers must yield to emergency vehicles by pulling over and stopping, clearing the intersection first if already inside it.
- 23 V.S.A. § 1050(b) requires moving over a full lane if safe, or slowing to a reasonable speed if the driver must remain in the adjacent lane.
- The manual requires drivers to stop for a school bus with flashing red lights from either direction, unless a physical median or barrier separates the roadways.
- Regardless of whether a crossing has gates or signals, drivers must never attempt to beat a visible train and must stop and wait for it to clear.
- Drivers must move over a lane or slow down when passing any stationary vehicle with flashing lights on the roadside, not just law enforcement vehicles.
- Drivers may not park their vehicle within the block where an emergency vehicle has stopped to respond to an incident.
- Drivers must yield to emergency vehicles by moving to the right edge of the roadway, staying clear of intersections, until it passes.
- Drivers must yield to emergency vehicles by pulling over to the right side of the road, clear of intersections, and stopping until the vehicle passes.
- The manual notes you only have right of way if the other vehicle isn't already in the intersection, meaning a vehicle already there should be allowed to clear first.
- The Move Over Law's amber-light tier covers highway maintenance vehicles, requiring drivers to move over or slow down similarly to emergency vehicles.
- The manual notes that if you're already in an intersection when an emergency vehicle approaches, you should proceed through it first before pulling over to stop.
- The priority is to stop safely away from traffic, shut off the engine, and move away from the vehicle before dealing with the fire.
- Per N.J.S.A. 39:4-81, a malfunctioning or dark traffic signal must be treated as an all-way stop.
- Safe driving practice, sometimes called a move-over rule, is to give stopped vehicles extra space by changing lanes or slowing down.
- Drivers must yield the right of way to emergency vehicles by pulling to the right edge of the road and stopping until the emergency vehicle has passed.
- Standard practice is to safely move to the right and stop, clearing the path for the emergency vehicle to pass.
- Standard guidance for hydroplaning is to ease off the gas and avoid sudden braking or steering, letting the tires regain contact with the road.
- The manual specifies the stop requirement does not apply when a physical median or other barrier separates the two roadways, unlike a simple painted line.
- Standard emergency procedure is to move fully onto the shoulder, activate hazard lights, and, if safe, move away from the travel lanes rather than stopping in traffic or continuing to drive on damaged equipment.
- Drivers should move to the right and yield the roadway to approaching emergency vehicles with active lights and sirens, stopping if necessary to let them pass safely.
- Authorized emergency vehicles may exceed posted limits during emergency duty with signals operating, as long as they do not endanger others.
- Standard right-of-way and safe-driving practice requires yielding to emergency vehicles by pulling right and stopping until they pass.
- Drivers must yield to emergency vehicles by pulling to the right and stopping, while making sure not to block the intersection.
- Pumping the brakes can build pressure in some systems, and downshifting uses engine braking to help slow the vehicle safely.
- If your car catches fire or smells like burning, pull over, shut off the engine, and get everyone away. Do not open the hot hood, since the rush of air will make the fire flare up.
- If the gas pedal sticks, shift to Neutral to cut the power, then brake and steer to the shoulder. Only turn off the engine after you have fully stopped, so you do not lose power steering.
Signs
Sign shape and color carry meaning before you even read the words. A red octagon always means stop, a red-bordered triangle pointing down means yield, and yellow diamonds warn of a hazard ahead. For every sign image used in our practice test, with the exact meaning and explanation, see the full road sign glossary.
Keep studying
This cheat sheet is a summary, not a substitute for practice. Test yourself with the free Arizona DMV practice test, which explains the reasoning behind every answer, or see Arizona DMV facts and fees before test day.