Study this first
Most-missed Washington DMV rules
These are the numbers and rules that trip up new drivers most often on the real Washington knowledge test. Every fact below comes from our free Washington DMV practice test question bank, which has 180 questions across 9 topics.
Speed limits
- RCW 46.61.400 sets the default maximum at 25 mph on city/town streets, 50 mph on county roads, and 60 mph on state highways unless signs say otherwise.
Right of way
- The Washington guide states pedestrians and bicyclists have the right-of-way at crosswalks and intersections whether marked or not.
- Washington requires drivers traveling in the same direction as a school bus to stop when its red lights flash and the stop-arm extends.
- Per the guide, emergency vehicles operating with lights and sirens always have the right-of-way over other traffic.
- Washington's guide categorically gives pedestrians right-of-way at all crosswalks and intersections, marked or unmarked.
- The Washington guide categorically states pedestrians and bicyclists share right-of-way protection at crosswalks and intersections, marked or not.
- At an uncontrolled intersection, the standard rule of the road is that the driver on the left must yield to the driver approaching from the right.
- 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
- Washington's per se DUI threshold for adult drivers is 0.08% BAC or higher, per DOL's DUI page.
- Washington sets the underage BAC threshold at 0.02%, higher than the true-zero standard some other states use.
- Washington sets separate BAC thresholds: 0.08% for drivers 21 and older, and 0.02% for drivers under 21 under the zero-tolerance law.
- Washington sets a per se marijuana-DUI limit of more than 5 ng/mL of active THC for drivers 21 and older, but any detectable THC is a violation for drivers under 21.
- A first-time DUI administrative suspension lasts 90 days for a first incident within 7 years, unless the driver enrolls in a pretrial 24/7 sobriety program.
- A first DUI conviction with BAC 0.15 or higher carries license revocation for 1 year, or until completing 120 days of a 24/7 sobriety program.
- A second DUI offense with BAC under 0.15 requires a minimum 30 days jail plus 60 days of electronic home monitoring, and a 2-year license suspension.
- A second DUI offense with BAC 0.15 or higher requires a minimum 45 days jail plus 90 days electronic monitoring and a 900-day license suspension.
- A third DUI offense with BAC under 0.15 requires a minimum 90 days jail plus 120 days electronic monitoring and a 3-year license revocation.
- A third DUI offense with BAC 0.15 or higher requires a minimum 120 days jail plus 150 days electronic monitoring, a minimum $1,500 fine, and a 4-year license revocation.
- Ignition interlock devices are mandatory for every DUI conviction tier in Washington, from first offense through repeat offenses.
Signals and markings
- A solid yellow line marks a no-passing zone for traffic on that side of the road, a standard traffic-marking convention used nationwide including Washington.
- A steady yellow signal warns that the light is about to turn red, so drivers should stop if they can do so safely.
- A flashing red signal functions like a stop sign, requiring a full stop before proceeding when it is safe.
- The manual instructs drivers not to change lanes once inside a roundabout.
- A flashing yellow signal warns drivers to proceed through the intersection with caution rather than requiring a full stop.
- 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 yellow line on your side of the centerline means you may not cross it to pass; passing is prohibited from that side.
- A flashing yellow arrow is a permissive signal allowing a left turn, but only after yielding to all oncoming traffic and pedestrians/cyclists in the crosswalk.
- A flashing red signal functions like a stop sign, requiring drivers to come to a complete stop before proceeding when it is safe.
- A solid yellow line on your side of the centerline indicates no passing is permitted from your side of the road.
- A solid yellow line on your side of the centerline means passing is not permitted there, usually due to reduced visibility or other roadway hazards.
- A flashing red signal functions the same as a stop sign, requiring drivers to come to a complete stop before proceeding when safe.
- A green arrow gives the protected right-of-way to proceed in that direction, though the driver must still yield to anyone already in the intersection.
- When a signal is dark or malfunctioning, drivers must treat the intersection as a four-way stop, coming to a full stop and yielding to the vehicle on the right if both arrive at the same time.
- A dashed yellow centerline indicates passing is generally allowed on that side when it is safe to do so and no other restriction applies.
- A steady yellow light warns that the right of way is ending and the signal is about to turn red.
- 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 green arrow grants a protected right of way to complete that turn without yielding to opposing traffic.
- A flashing yellow signal is a caution indicator, telling drivers to slow down and proceed carefully rather than stop.
- A solid yellow line on a driver's side of the centerline indicates that passing is prohibited from that side of the road.
- A solid red arrow requires a complete stop and prohibits the turn until the signal changes, unlike a flashing red or green arrow.
- A flashing red signal is treated the same as a stop sign: come to a full stop, then proceed only when it is safe.
- A driver turning left must yield the right-of-way to all oncoming traffic, including bicyclists, before completing the turn.
- A flashing yellow signal warns drivers to slow down and proceed carefully through the intersection, unlike a dark signal which is treated as a stop.
- 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
- Legal parking requires checking posted signs and curb color/markings for restrictions, a general parking-safety principle applicable in Washington.
- Parking in or near a crosswalk obstructs pedestrian visibility and right-of-way, which is why it is restricted under general traffic law.
Safe driving
- The guide's speed-management section stresses adjusting speed for road, weather, and traffic conditions rather than treating posted limits as always safe.
- The guide's speed section links speed management with keeping a safe following distance, since speed affects the distance needed to stop safely.
- Washington's guide specifies a fixed half-hour window after sunset and before sunrise, rather than a general 'dusk to dawn' rule.
- The guide teaches that speed should be adjusted downward when conditions like rain reduce visibility or traction, even below the posted limit.
- The guide's speed-management guidance ties following distance directly to speed, since faster travel requires more room to stop safely.
- The half hour before/after sunrise/sunset rule addresses the transitional low-light periods when visibility for drivers and others can be reduced.
- Intermediate license restrictions prohibit use of cell phones and other wireless communication devices even with hands-free technology.
- The staged law requires a booster seat from age 4 until the child reaches 4 feet 9 inches tall, after which a regular seat belt is used.
- Drivers must yield to emergency vehicles with active lights and siren by safely moving aside, not stopping in the travel lane.
- Handbooks generally recommend a multi-second following distance that should be increased in bad weather, at higher speeds, or in heavy traffic.
- General safe-driving principles hold that adverse weather reduces traction and visibility, requiring lower speeds than posted limits allow in good conditions.
- A safe following distance gives a driver time to react and stop without a collision if traffic ahead slows or stops.
- 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.
- Since entering roundabout traffic must yield to vehicles already circulating, slowing down and watching for a safe gap is the correct approach.
- The manual stresses that no one should ever assume they automatically have the right of way, since other drivers may not yield as expected.
- Children under 7 must use a child restraint system meeting 49 CFR 571.213 standards unless they are 57 inches or taller.
- Safe driving practice calls for maintaining enough distance behind the vehicle ahead to react and stop safely if it brakes suddenly.
- 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
- 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.
- Regulatory signs like stop and yield signs establish legally mandated driver actions, distinct from purely informational or warning signage.
- Warning signs alert drivers to hazards or changing conditions ahead, while regulatory signs like stop/yield signs impose legally required actions.
- 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.
- The manual specifically calls out School Crossing signs with children present as requiring reduced speed.
- The octagon shape combined with red coloring is reserved exclusively for stop signs, requiring a full stop.
- The manual specifies reduced speed limits apply at locations marked with a School Crossing sign when children are present.
- Warning signs (typically yellow, diamond shaped) inform drivers of hazards ahead like curves or crossings, distinct from regulatory signs that state legal requirements.
- Diamond-shaped yellow signs are standard warning signs alerting drivers to hazards like curves, merges, or crossings ahead.
- The five-sided pentagon shape is reserved specifically for school-related warning signs, distinct from all other warning sign shapes.
- Yellow diamond signs are standard warning signs alerting drivers to hazards or changing road conditions ahead.
- The triangular shape is uniquely reserved for Yield signs, telling drivers to slow and give way rather than come to a full stop.
- A stop sign always requires a complete stop and yielding to cross traffic and pedestrians before proceeding, consistent with the manual's yield principle.
- The eight-sided red STOP sign requires a full stop before entering the intersection, regardless of visible cross traffic.
- The downward-pointing triangle is the standard yield sign shape, meaning drivers must slow and give the right of way if needed rather than always stopping.
- Diamond-shaped yellow signs are warning signs, alerting drivers to hazards like curves, merges, or crossings ahead.
- Speed limit signs are standard rectangular white regulatory signs, distinct from the diamond-shaped yellow warning signs.
- Drivers must stop at the marked line or crosswalk, or at the edge of the intersection if there is no marking, before proceeding.
- The circular yellow sign shape is specifically reserved in the national sign system for advance railroad crossing warnings.
- Diamond-shaped yellow signs are standard warning signs alerting drivers to hazards ahead, such as curves, merges, or intersections.
- The five-sided pentagon shape is used nationally to indicate school zones and school crossing warnings.
- At a yield sign, drivers must slow or stop as needed to let crossing or oncoming traffic clear before proceeding safely.
- White rectangular signs with black lettering are the standard shape and color used for regulatory information like speed limits or turn rules.
- Pentagon-shaped signs are used specifically to indicate school zones or school crossings, alerting drivers to reduce speed.
- 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
- Washington uses the Department of Licensing (DOL), not a DMV/MVC/BMV, per dol.wa.gov.
- The official DOL knowledge test contains 40 multiple-choice and true/false questions.
- DOL requires answering at least 32 of 40 questions correctly, which is 80%.
- Washington has a 'Physical Control' law addressing impaired individuals in control of a vehicle, distinct from a standard DUI charge.
- Washington's DOL publishes the driver guide in numerous languages, including Vietnamese, to support non-English speakers.
- Washington's DOL does not prominently date-stamp the guide as an annual edition; it is revised periodically instead.
- Teens may apply for an instruction permit as early as age 15, or 15.5 if not enrolled in a driver training course.
- An intermediate license requires being at least 16 years old and a Washington resident.
- For the first 6 months, teens may carry no passengers under age 20 except immediate family members.
- Intermediate license holders may not drive between 1 a.m. and 5 a.m. unless accompanied by a parent, guardian, or a licensed driver at least 25 years old.
- After the first 6 months, intermediate license holders may carry no more than 3 passengers under age 20, except immediate family, until age 18 or one year has passed.
- Intermediate license holders may drive at any hour with passengers if the trip is for agricultural purposes.
Emergencies
- Emergency vehicles with lights and sirens always have the right-of-way in Washington, so other drivers must yield.
- Because trains always have the right-of-way per the Washington guide, drivers must never try to race a train across a crossing.
- General Washington traffic law requires drivers involved in a collision to stop, remain at the scene, and provide information as needed.
- Since emergency vehicles always have the right-of-way in Washington, drivers must actively yield and clear a safe path when possible.
- The lane-change requirement applies on interstates and any multi-lane highway with four or more lanes that has at least two lanes traveling in the same direction.
- 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 moving to the right edge of the roadway, staying clear of intersections, until it passes.
- 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.
- Pumping the brakes can build pressure in some systems, and downshifting uses engine braking to help slow the vehicle safely.
- Rapid brake lights or hazard signals ahead indicate a potential emergency or obstruction, so drivers should slow down and prepare to react safely.
- 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.
- Hazardous materials carriers must stop at every railroad crossing regardless of visible train activity, so drivers behind them should expect and safely wait through this stop.
- 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.
- On typical two-lane roads, traffic in both directions must stop for a loading school bus; the opposite-direction exception applies only on wider divided highways.
- The priority is to stop safely away from traffic, shut off the engine, and move away from the vehicle before dealing with the fire.
- Move over laws generally require drivers to change lanes away from a stopped emergency or hazard vehicle when safe, or otherwise slow 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.
- General emergency guidance for brake failure is to pump the brakes and use engine braking by downshifting to slow down safely.
- Authorized emergency vehicles may exceed posted limits during emergency duty with signals operating, as long as they do not endanger others.
- Drivers are expected to keep a substantial following distance after an emergency vehicle passes, rather than closing in immediately.
- The manual instructs drivers to pull to the right edge and remain stopped until the emergency vehicle passes.
- 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 may not park their vehicle within the block where an emergency vehicle has stopped to respond to an incident.
- Drivers must yield right-of-way, pull as far right as possible, stop, and remain stopped until the emergency vehicle has passed.
- A move-over violation causing death carries a fine of up to $10,000 and a 1-year license suspension, compared to 90 days for bodily injury and 6 months for serious bodily injury.
- Drivers are required to stop at the scene of a crash involving injury or significant damage, provide information, and call for assistance if needed.
- When a safe lane change isn't possible, drivers are generally expected to reduce speed and use caution passing the stopped vehicle.
- 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 Washington DMV practice test, which explains the reasoning behind every answer, or see Washington DMV facts and fees before test day.