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Most-missed Delaware DMV rules
These are the numbers and rules that trip up new drivers most often on the real Delaware knowledge test. Every fact below comes from our free Delaware DMV practice test question bank, which has 180 questions across 9 topics.
Speed limits
- Delaware sets school zone speed limits at 20 mph when children are present.
- Delaware's tiered speed table sets two-lane roads at 50 mph.
- Divided roads with four or more lanes are generally posted at 55 mph in Delaware.
- Route 1 and Interstate 495 are specifically signed for 65 mph, above the usual 55 mph controlled-access limit.
- Excessive speeding of roughly 50 mph over the limit (or 100 mph on a highway) carries a mandatory one-year suspension in Delaware.
- This section of Route 1 has a set maximum speed of 65 mph, excluding the toll plaza area.
Right of way
- At a four-way stop, the first vehicle to reach the intersection has the right to go first.
- Delaware requires drivers entering a roadway from a driveway, alley, or parking lot to yield to traffic already on the road.
- Delaware drivers must yield to vehicles already established in a traffic circle or rotary before entering.
- Delaware right-of-way rules require yielding to the vehicle being overtaken, ensuring a safe pass.
- Delaware's framework is built around yielding requirements rather than actively granting right-of-way to anyone.
- Delaware drivers must yield to pedestrians crossing on a sidewalk or at a driveway crossing.
- The Delaware Driver Manual specifically instructs drivers not to horn near a blind pedestrian using a guide dog or white cane, since it could confuse or frighten them; these pedestrians have absolute right-of-way.
- Delaware's rule for simultaneous arrivals at a 4-way stop is that the vehicle on the right goes first; the first vehicle to reach the intersection otherwise goes first.
- Delaware law requires yielding to the vehicle approaching from the right at an uncontrolled intersection.
- A driver making a left turn must yield to oncoming vehicles proceeding straight through the intersection.
- 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
- Delaware treats a BAC of 0.08% (or presence of an illicit drug) as conclusive evidence of DUI for adult drivers.
- Commercial drivers in Delaware face a stricter 0.04% BAC threshold.
- Delaware's Zero Tolerance Law revokes the license of a driver under 21 with a BAC of 0.02% or greater, far below the adult threshold.
- A first Zero Tolerance violation results in a 2-month license revocation for drivers under 21.
- Delaware treats the presence of an illicit or recreational drug, not just a 0.08% BAC, as conclusive evidence supporting a DUI charge.
- A BAC of .08 or more is conclusive evidence of DUI, but a driver can still be charged with DUI under .08 based on impairment evidence.
- Delaware's tiered first-offense DUI revocation is 18 months for a BAC between .15 and .19.
- Court sanctions for a first DUI offense include a fine of $500 to $1,500 and/or imprisonment up to 12 months.
- A third DUI offense after two priors is a Class G felony, with a fine up to $5,000 and 1 to 2 years imprisonment.
- A seventh or greater DUI offense is a Class C felony with a mandatory 60-month DMV license loss.
- Refusing a chemical test on a first offense results in a 12-month revocation, versus 3 months for probable-cause-only findings.
- A CMV driver with a BAC of .04 or more, or who refuses testing, is disqualified from driving a CMV for one year on a first offense.
- The IID First Offender Election program requires a minimum of four months on the device from the date the IID license is issued.
Signals and markings
- Delaware law requires drivers to signal 300 feet prior to their intended turn, stop, or lane change.
- Hand signals remain a legally valid backup to electric signals; a straight, extended left arm signals a left turn.
- A steady yellow light warns that the signal is about to change to red, so drivers should slow and prepare to stop if it is safe to do so.
- A dashed yellow center line indicates passing is generally permitted when it can be done safely, unlike a solid yellow line.
- 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 red signal functions like a stop sign, requiring drivers to come to a complete stop before proceeding when it is safe.
- A steady yellow light warns that the right of way is ending and the signal is about to turn red.
- 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 line means passing is allowed when there is a safe gap in oncoming traffic, unlike a solid yellow line.
- A flashing yellow signal is a caution indicator meaning drivers may proceed but should do so carefully.
- Even on a green arrow, a driver must yield to other vehicles already lawfully in the intersection.
- A flashing yellow signal warns drivers to proceed through the intersection with caution rather than requiring a full stop.
- 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 steady red light always requires a complete stop before the intersection unless a sign specifically permits turning after stopping.
- A flashing red signal is legally equivalent to a stop sign: the driver must come to a full stop before proceeding when clear.
- A dashed yellow centerline indicates passing is permitted on that side, provided it can be done safely and there is no oncoming traffic conflict.
- The manual requires dimming high beams for oncoming traffic to avoid blinding other drivers.
- A flashing yellow signal warns drivers to slow down and proceed carefully, unlike a solid red which requires a full stop.
- 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 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
- The road skills exam takes about 30 minutes and tests parallel parking, the three-point turn, backing 50 feet, merging, lane changes, and intersections.
Safe driving
- Even though advisory signs are not legal limits, ignoring them and crashing can support a citation under Delaware's general reasonable-speed requirement.
- Even without direct legal force, advisory signs warn of real hazards, and Delaware's reasonable-speed rule means ignoring them can still expose a driver to liability.
- Delaware law requires drivers to leave a minimum of three feet of clearance when passing a cyclist.
- Because posted speed limits assume ideal conditions, the handbook advises reducing speed in rain and other hazardous conditions.
- Safe driving practice calls for maintaining enough distance behind the vehicle ahead to react and stop safely if it brakes suddenly.
- The manual stresses that no one should ever assume they automatically have the right of way, since other drivers may not yield as expected.
- Wet roads increase stopping distance, so drivers should slow down and add extra space to compensate for reduced traction.
- 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.
- Since entering roundabout traffic must yield to vehicles already circulating, slowing down and watching for a safe gap is the correct approach.
- 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 yielding to pedestrians, cyclists, and others still clearing the intersection even if you'd otherwise have priority.
- Easing off the gas and holding a straight steering direction allows the tires to regain contact with the road surface safely.
- 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.
- 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.
- Handbooks generally recommend a multi-second following distance that should be increased in bad weather, at higher speeds, or in heavy traffic.
- Scanning further ahead gives drivers earlier warning of hazards, slowing traffic, or obstacles, allowing more time to react safely.
- Work zones require reduced speed and heightened alertness because of workers, equipment, and changing lane patterns.
- Drivers in both directions on an undivided road must stop for a school bus with flashing red lights until it is safe to proceed.
- Drivers must yield to emergency vehicles with active lights and siren by safely moving aside, not stopping in the travel lane.
- Drivers must stop for a school bus with flashing red lights and remain stopped until the lights stop flashing, protecting children crossing.
- Fatigue slows reaction time and judgment similarly to impairment, and can lead to microsleeps that cause the driver to lose control.
- The manual requires dimming to low beams at least 300 feet before overtaking or following another vehicle.
- On undivided roads, traffic in both directions must stop for a school bus with flashing red lights and an extended stop sign until it resumes moving.
- 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
- 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 five-sided pentagon shape is reserved specifically for school-related warning signs, distinct from all other warning sign shapes.
- Warning signs alert drivers to hazards or changing conditions ahead, while regulatory signs like stop/yield signs impose legally required actions.
- A YIELD sign requires slowing down and stopping only if needed to give way to traffic or pedestrians on the intersecting road.
- The manual specifically calls out School Crossing signs with children present as requiring reduced speed.
- Diamond-shaped yellow signs are standard 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.
- Regulatory signs like stop and yield signs establish legally mandated driver actions, distinct from purely informational or warning signage.
- The octagonal red stop sign universally requires a full stop before the driver may proceed when safe.
- Pentagon-shaped signs are used specifically to indicate school zones or school crossings, alerting drivers to reduce speed.
- A stop sign requires a complete stop, regardless of whether other vehicles or pedestrians are present.
- The eight-sided octagon shape is reserved exclusively for Stop signs so it can be recognized even from behind or in poor visibility.
- A yield sign requires slowing and yielding to conflicting traffic, stopping only if needed to avoid a hazard.
- Diamond-shaped yellow signs are warning signs, alerting drivers to hazards like curves, merges, or crossings ahead.
- Diamond-shaped yellow signs are warning signs, alerting drivers to hazards or changes in road conditions ahead.
- Drivers must stop at the marked line or crosswalk, or at the edge of the intersection if there is no marking, before proceeding.
- 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
- Delaware requires reasonable-for-conditions driving on top of the posted numeric limit.
- Delaware bans all cell phone and electronic device use for GDL holders, including hands-free devices, which is stricter than the adult rule.
- Adult Delaware drivers may use hands-free devices, unlike GDL holders who face a total ban.
- Delaware law ties headlight use directly to wiper use during inclement weather, not solely to a visibility distance.
- The Delaware Division of Motor Vehicles publishes the official Driver Manual as the authoritative source for state rules.
- The Driver Services written-test page cites roughly 81.25% (26 of 32 questions correct) as the passing threshold.
- The motorcycle knowledge test requires 20 of 25 correct, which is 80%.
- Delaware requires a minimum acceptable vision of 20/40, with or without corrective lenses.
- Applicants must have completed a Delaware Driver Education Certificate, known as the Blue/White Certificate.
- Only an adult supervisor (25+, licensed 5+ years) and one other passenger are permitted, with an exception for immediate family members.
- The sponsor must certify 50 hours of driving, 10 of which include night-time driving, before unsupervised privileges begin.
- Unsupervised driving is allowed only between 6:00 a.m. and 10:00 p.m., with narrow exceptions for church, work, or school.
- A learner's permit holder must wait at least 10 days after issuance before taking the road exam.
- Delaware's reciprocity agreements for a Class D license cover drivers licensed in Germany, Taiwan, and France.
Emergencies
- Delaware law requires drivers to yield to emergency vehicles using sirens, air horns, or flashing lights by pulling to the right edge of the road, not stopping in the travel lane.
- Delaware's Move Over law requires drivers on a multi-lane roadway to move a full lane away from a stopped emergency vehicle.
- General emergency guidance for brake failure is to pump the brakes and use engine braking by downshifting to slow down safely.
- Per N.J.S.A. 39:4-81, a malfunctioning or dark traffic signal must be treated as an all-way stop.
- Drivers are expected to keep a substantial following distance after an emergency vehicle passes, rather than closing in immediately.
- Steering gently in the direction you want to go while easing off the accelerator helps regain control during a skid.
- 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 manual specifies the stop requirement does not apply when a physical median or other barrier separates the two roadways, unlike a simple painted line.
- 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.
- 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 moving to the right edge of the roadway, staying clear of intersections, until it passes.
- The Move Over Law's amber-light tier covers highway maintenance vehicles, requiring drivers to move over or slow down similarly to emergency vehicles.
- 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.
- Move Over laws require drivers to move over or slow down for any stopped vehicle with warning lights activated, to protect people near the roadway.
- Authorized emergency vehicles may exceed posted limits during emergency duty with signals operating, as long as they do not endanger others.
- 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.
- When a safe lane change isn't possible, drivers are generally expected to reduce speed and use caution passing the stopped vehicle.
- Safe driving practice, sometimes called a move-over rule, is to give stopped vehicles extra space by changing lanes or slowing down.
- Standard practice is to safely move to the right and stop, clearing the path for the emergency vehicle to pass.
- 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.
- Standard practice for emergency vehicle right-of-way is to safely move to the right side of the road and stop to let it pass.
- 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 Delaware DMV practice test, which explains the reasoning behind every answer, or see Delaware DMV facts and fees before test day.