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Most-missed Oregon DMV rules
These are the numbers and rules that trip up new drivers most often on the real Oregon knowledge test. Every fact below comes from our free Oregon DMV practice test question bank, which has 180 questions across 8 topics.
Speed limits
- Oregon's statutory unposted limit for alleys and narrow residential roadways is 15 mph under ORS 811.111.
- Absent posted signage, Oregon's statutory limit for residential districts is 25 mph.
- Oregon law sets the statutory business-district limit at 20 mph when no other speed is posted.
- ORS 811.111 sets 55 mph as the general statutory highway limit where no other limit applies or is posted.
- Statutory limits are defaults for unposted areas; actual posted signage governs when it specifies a different speed.
- Oregon's standard interstate maximum speed is 65 mph, though trucks over 10,000 lbs GVWR, school buses, and worker transport buses are capped at 55 mph.
- A special posted 70 mph limit applies on I-84 (The Dalles to Idaho border) and I-82 (Washington border to I-84) for non-commercial vehicles; commercial vehicles are limited to 65 mph.
- On these eastern Oregon highways the speed limit is 65 mph for standard vehicles and 60 mph for commercial vehicles.
- Oregon's 20 mph school zone limit applies when a flashing light is active, between 7 a.m. and 5 p.m. on a school day, or whenever children are present at a crosswalk.
Right of way
- Drivers must yield to pedestrians in the process of turning before completing the turn.
- Drivers using a transit lane for a permitted maneuver must yield to any transit vehicles and cyclists using that lane.
- Motorized wheelchairs and scooters are permitted in bike lanes, and drivers must yield to them as they would to other bike lane users.
- Oregon law requires drivers to stop and remain stopped for pedestrians in marked or unmarked crosswalks.
- Drivers entering a roundabout must yield to traffic already circulating in it.
- 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
- Commercial drivers face a stricter 0.04% BAC threshold than the 0.08% standard for regular drivers.
- Once an underage driver reaches the adult 0.08% threshold, they face full DUII criminal charges just like an adult.
- A BAC of 0.08% or higher is DUII for standard drivers 21 and older under Oregon law.
- Refusing a breath or blood test under Oregon's Implied Consent law results in a 1-year suspension, increased to 3 years if the person has an aggravating prior within 5 years.
- Failing a breath/blood test results in a 90-day suspension, increased to 1 year if the person has a qualifying prior within 5 years.
- Oregon's zero-tolerance law means any detectable blood alcohol content, rather than the standard 0.08%, is a test failure for drivers under 21.
- Oregon law prohibits open containers anywhere in the passenger area; even a resealed container with a broken seal still counts as open and must be stored in the trunk.
Signals and markings
- After a complete stop, right turns on red onto two-way roads are allowed unless signage specifically prohibits it.
- A bike box lets cyclists position ahead of traffic; drivers must stop behind the box rather than within it.
- On a plain green light, a left-turning driver must yield to oncoming traffic and pedestrians before completing the turn.
- A flashing yellow arrow permits the indicated turn but the driver must first yield to pedestrians and oncoming traffic.
- Double solid yellow lines indicate that passing is not permitted from either direction on that stretch of road.
- A flashing red signal functions like a stop sign, requiring drivers to come to a complete stop before proceeding when safe.
- A law enforcement officer's directions override traffic signals, so drivers must obey the officer even if it means stopping on a green light.
- A steady red light requires a full stop; cross traffic has the right of way until the light changes.
- 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 flashing red signal functions the same as a stop sign, requiring drivers to come to a complete stop before proceeding when safe.
- A flashing red signal is treated the same as a stop sign: come to a full stop, then proceed only when it is safe.
- At uncontrolled intersections, drivers must yield to vehicles that are already in the intersection.
- 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 red light always requires a complete stop before the intersection unless a sign specifically permits turning after stopping.
- The truck apron is a raised, paved area only meant for large truck wheels; ordinary vehicles should never drive on it.
- A flashing red signal functions like a stop sign, requiring drivers to come to a complete stop before proceeding when it is safe.
- A red flashing light is treated like a stop sign: stop, then yield to vehicles already in or entering the intersection.
- A flashing yellow signal warns drivers to proceed through the intersection with caution rather than requiring a full stop.
- A yellow light signals that the light is about to change to red, and drivers should stop if they can do so safely rather than accelerate through it.
- A dashed yellow center line indicates passing is generally permitted when it can be done safely, unlike a solid yellow line.
- A dashed yellow centerline indicates passing is permitted on that side, provided it can be done safely and there is no oncoming traffic conflict.
- A broken yellow line on your side permits passing when safe, while a solid yellow line on your side prohibits passing, a standard center-line marking convention drivers must recognize.
- A solid yellow line on your side of the centerline indicates no passing is permitted from your side of the road.
- A steady yellow light warns that the right of way is ending and the signal is about to turn red.
- A flashing yellow signal is a caution indicator, telling drivers to slow down and proceed carefully rather than 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.
Safe driving
- Safety corridors mark highway segments with elevated fatal and serious-injury collision rates, where drivers are encouraged to use headlights.
- At higher passing speeds, Oregon expects drivers to leave clearance sufficient to protect a cyclist even if they were to fall over.
- Because safety corridors have higher serious-crash rates, drivers are encouraged to use headlights on to improve visibility and safety.
- Endangering a highway worker with no injury results in a fine of $500 to $1,000, rising to as much as $5,000 if great bodily injury results.
- The manual advises reducing speed for wet roads, reducing it further for packed snow, and slowing to a crawl on ice, since traction decreases as conditions worsen.
- Passengers under 2 years old must specifically be secured in a rear-facing child restraint system.
- Safe lane changes require checking mirrors, checking blind spots by looking over the shoulder, and signaling the intended move before moving over.
- General safe-driving principles call for maintaining an adequate following distance that increases with speed and worsening conditions to allow safe stopping.
- A safe following distance gives a driver time to react and stop without a collision if traffic ahead slows or stops.
- Easing off the gas and holding a straight steering direction allows the tires to regain contact with the road surface safely.
- Drivers must stop for a school bus with flashing red lights and remain stopped until the lights stop flashing, protecting children crossing.
- Hydroplaning occurs when water accumulates faster than tire treads can disperse it, causing loss of contact with the road.
- Because SMV-marked vehicles like tractors move slowly and may turn into fields or driveways, safe practice is to keep distance and watch for signals before passing.
- The Basic Speed Rule obligates drivers to reduce speed below the posted maximum in hazardous conditions.
- 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 manual explains posted limits are for ideal conditions, and driving that speed in bad conditions can still be cited as too fast for conditions.
- Rural highways through unfenced farm and ranch land require extra alertness for livestock and wildlife crossing the road.
- The core safety reasoning is that other drivers may not yield as expected, so defensive caution prevents collisions.
- Work zones require reduced speed and heightened alertness because of workers, equipment, and changing lane patterns.
- Since farm tractors typically travel around 25 mph, the speed differential requires extra caution and clearance when passing.
- Sudden braking or sharp steering after a blowout can cause loss of control; easing off the gas while steering straight is safer.
- 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
- Oregon's default school zone speed while the flashing beacon is active is 20 mph.
- 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 specifies reduced speed limits apply at locations marked with a School Crossing sign when children are present.
- The octagon shape combined with red coloring is reserved exclusively for stop signs, requiring a full stop.
- Diamond-shaped yellow signs are warning signs, alerting drivers to hazards like curves, merges, or crossings ahead.
- A stop sign requires a complete stop, regardless of whether other vehicles or pedestrians are present.
- 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 downward-pointing red and white triangle is the standard yield sign, instructing drivers to slow and give way to traffic as needed, stopping only if required for safety.
- Diamond-shaped yellow signs are standard warning signs alerting drivers to hazards like curves, merges, or crossings ahead.
- An inverted triangle is the standard shape used for yield signs, instructing drivers to slow and give way to other traffic.
- 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.
- Orange is the standard color used for temporary construction and work zone signs, regardless of the specific shape used.
- 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 warning signs, alerting drivers to hazards or changes in road conditions ahead.
- A circular sign with a diagonal slash through it is used nationally to show that a prior restriction (like a speed limit) no longer applies.
- The triangular yield sign shape signals drivers to give the right-of-way as needed to other traffic or pedestrians.
- Diamond-shaped yellow signs are the standard shape/color combination used for general warning signs about upcoming hazards or conditions.
- Regulatory signs like stop and yield signs establish legally mandated driver actions, distinct from purely informational or warning signage.
- The eight-sided red STOP sign requires a full stop before entering the intersection, regardless of visible cross traffic.
- The eight-sided red STOP sign requires a complete stop at the marked line or intersection before proceeding when safe.
- 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
- After exhausting the allowed online attempts, applicants must finish testing in person at a DMV office.
- Oregon ended its decades-old full-service-only law in 2023, permitting self-serve fueling in a state that had long prohibited it.
- Drivers may briefly use a bike lane only to turn or reach a driveway/alley, not for general driving or parking.
- Oregon doubles traffic fines within designated work zones to encourage caution around workers and equipment.
- Transit lanes may be entered briefly by regular drivers only for specific maneuvers like turning or parking, while yielding to buses and cyclists.
- The Oregon Driver Manual is produced by ODOT's Driver and Motor Vehicle Services (DMV) Division.
- Passing or overtaking another vehicle inside a roundabout is illegal in Oregon.
- Teens who complete an ODOT-approved driver education course need at least 50 hours of supervised practice; without it, 100 hours are required.
- In the first 6 months, provisional license holders may carry no passengers under 20 except immediate family, and may not drive between midnight and 5 a.m.
- In the second 6 months, provisional drivers may carry no more than 3 passengers under 20 (excluding immediate family), with the midnight to 5 a.m. curfew still in effect.
- Provisional license restrictions end after 1 year of holding the license or at age 18, whichever comes first.
- Curfew exceptions include driving between home and work, driving to a school event with no other transportation, employment-related driving, and being accompanied by a licensed driver age 25 or older.
- Oregon's knowledge test has 35 multiple-choice questions and requires 28 correct answers (80%) to pass.
- Oregon law prohibits drivers under 18 from using a cell phone or mobile device while driving under any circumstances, including hands-free.
- Drivers 18 and older may only use a mobile device hands-free, defined as minimal single-finger activation, and may not view TV, tablet, or video displays while driving.
- Oregon law makes it a violation to play a vehicle's audio system loud enough to be heard from 50 feet away from the vehicle.
- Under ORS 815.165, studded tires are only legal for use on Oregon roads from November 1 through March 31 each year.
Emergencies
- On multi-lane roads, drivers should move over away from a stopped vehicle with flashing lights, or slow well below the posted limit if a lane change isn't safe.
- Drivers are expected to keep a substantial following distance after an emergency vehicle passes, rather than closing in immediately.
- Oregon's 'Move It' law requires drivers in a non-injury crash to move drivable vehicles out of the travel lane to avoid blocking traffic.
- 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.
- 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.
- Drivers must yield right-of-way to emergency vehicles operating with active lights and siren.
- 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.
- Pumping the brakes can build pressure in some systems, and downshifting uses engine braking to help slow the vehicle safely.
- Moving vehicles safely out of the flow of traffic prevents further collisions before drivers exchange license and insurance information.
- Safe driving practice, sometimes called a move-over rule, is to give stopped vehicles extra space by changing lanes or slowing down.
- 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.
- 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.
- The priority is to stop safely away from traffic, shut off the engine, and move away from the vehicle before dealing with the fire.
- 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 handbook states drivers must always yield right-of-way to emergency vehicles.
- Move over laws generally require drivers to change lanes away from a stopped emergency or hazard vehicle when safe, or otherwise slow down.
- Standard practice is to safely move to the right and stop, clearing the path for the emergency vehicle to pass.
- When changing lanes is not safe, the Move Over Law still expects drivers to reduce speed and use caution passing the stopped vehicle.
- Sudden hard braking or sharp steering after a blowout can cause loss of control; easing off the gas while holding a straight line is safer.
- 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 Oregon DMV practice test, which explains the reasoning behind every answer, or see Oregon DMV facts and fees before test day.