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Most-missed Kansas DMV rules
These are the numbers and rules that trip up new drivers most often on the real Kansas knowledge test. Every fact below comes from our free Kansas DMV practice test question bank, which has 180 questions across 9 topics.
Speed limits
- Absent other posted limits, Kansas law sets 65 mph as the default speed on state or federal highways outside urban districts.
- Kansas law defaults to a 55 mph limit on county or township roads when no other limit is posted.
- Kansas's basic speed law requires driving at a speed that is reasonable and prudent given conditions, even if that means going slower than the posted limit.
- Kansas's minimum speed provision prohibits driving at a speed that unnecessarily blocks or impedes the normal flow of traffic without a legitimate reason.
- K.S.A. 8-1558 sets 75 mph as the maximum on separated multilane highways such as rural interstates/freeways.
- Kansas law sets the maximum speed limit in urban districts at 30 mph, lower than the limits for highways and county/township roads.
Right of way
- When two vehicles arrive at an intersection simultaneously, Kansas law gives the right-of-way to the driver on the right.
- A driver turning left must yield the right-of-way to oncoming vehicles that are traveling straight through the intersection.
- Vehicles already on a public street or highway have the right-of-way over vehicles entering from a private drive or side road.
- A driver emerging from an alley or driveway must stop before crossing the sidewalk, then yield to pedestrians and traffic before entering the street.
- A yield sign only requires a full stop when necessary to avoid interfering with traffic or pedestrians who already have the right-of-way; otherwise a driver may proceed after yielding.
- Kansas law prohibits entering an intersection, crosswalk, or railroad crossing, even on a green light, unless there is enough room on the other side to get all the way through without blocking traffic.
- At a four-way stop, the driver who arrives at the intersection first is given the right-of-way by the other drivers waiting.
- At an uncontrolled intersection, a vehicle already present or that entered first is typically given the right-of-way over one arriving later.
- 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
- The handbook notes that impairment effects such as reduced vision and judgment can start at roughly .02% BAC for any driver, well before the legal DUI limit.
- The handbook clarifies drivers can still be found impaired below .08% because DUI can be established through evidence of actual impairment, not solely a BAC reading.
- Kansas sets the per se DUI limit at .08% BAC for drivers who are 21 years of age or older.
- A first chemical test refusal in Kansas triggers a mandatory 1-year license suspension, with 2, 3, and 10 years for subsequent refusals.
- A BAC of 0.15+ triggers enhanced penalties including a mandatory 1-year suspension even on a first offense, versus 30 days for a standard under-0.15 first offense.
- A first-time high-BAC offender must use an ignition interlock device for 1 year after suspension, escalating to 2, 3, 4, and 10 years for subsequent occurrences.
- Kansas's zero-tolerance law sets the threshold at 0.02 BAC for drivers under 21, far below the standard 0.08 adult threshold.
Signals and markings
- A solid yellow line on your side of the centerline indicates that passing is prohibited from that side of the road.
- A dashed yellow center line indicates passing is generally permitted when it can be done safely, unlike a solid yellow line.
- A flashing red signal functions the same as a stop sign, requiring drivers to stop completely and then proceed only when it is safe.
- A flashing yellow signal warns drivers to slow down and proceed carefully through the intersection, without requiring a full stop.
- At uncontrolled intersections, drivers must yield to vehicles that are already in the intersection.
- A steady yellow light warns the signal is about to turn red; drivers should stop safely if possible or proceed with caution if too close to stop.
- Even on a green arrow, a driver must yield to other vehicles already lawfully in the intersection.
- Broken white lines between same-direction lanes indicate that changing lanes is allowed when it can be done safely.
- A flashing yellow arrow permits the indicated turn but the driver must first yield to pedestrians and oncoming traffic.
- The truck apron is a raised, paved area only meant for large truck wheels; ordinary vehicles should never drive on it.
- A driver turning left must yield the right-of-way to all oncoming traffic, including bicyclists, before completing the turn.
- 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 handbook notes posted limits are for ideal conditions, so hazards like hills and curves require a driver to slow below the sign's number.
- 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 like a stop sign, requiring drivers to come to a complete stop before proceeding when safe.
- 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 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 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
- Standard parking practice, referenced in most state handbooks including Kansas's, is to park close to the curb so your vehicle doesn't block traffic flow.
- Keeping clear of fire hydrants ensures firefighters have unobstructed access to water supply in an emergency.
Safe driving
- Reduced traction on wet or icy roads increases the distance needed to stop safely, so extra following distance helps prevent collisions.
- Scanning further ahead gives drivers earlier warning of hazards, slowing traffic, or obstacles, allowing more time to react safely.
- 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.
- Checking blind spots in addition to mirrors helps drivers detect vehicles that mirrors cannot show, reducing the risk of a collision during lane changes.
- Kansas law requires headlights on any time windshield wipers are in use because of weather conditions.
- The Kansas manual instructs drivers to maintain a minimum following distance of two full seconds, adding a second for unusual conditions.
- Passengers under 2 years old must specifically be secured in a rear-facing child restraint system.
- Fatigue slows reaction time and judgment similarly to impairment, and can lead to microsleeps that cause the driver to lose control.
- 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 requires headlights to be on whenever visibility is under 1,000 feet.
- Safe driving practice calls for maintaining enough distance behind the vehicle ahead to react and stop safely if it brakes suddenly.
- A minimum three-second following gap gives most drivers enough time to react and stop safely under normal conditions.
- Sudden braking or sharp steering after a blowout can cause loss of control; easing off the gas while steering straight is safer.
- General safe-driving principles call for maintaining an adequate following distance that increases with speed and worsening conditions to allow safe stopping.
- Handbooks generally recommend a multi-second following distance that should be increased in bad weather, at higher speeds, or in heavy traffic.
- General right-of-way practice, reflected in the manual, is that the first vehicle to arrive and stop proceeds first; simultaneous arrivals yield to the right.
- The manual warns that leaving a large vehicle's wind-sheltered draft can expose your car to a sudden crosswind push, requiring a steering correction.
- 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 core safety reasoning is that other drivers may not yield as expected, so defensive caution prevents collisions.
- 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.
- Children under 7 must use a child restraint system meeting 49 CFR 571.213 standards unless they are 57 inches or taller.
- 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.
- 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.
- Safe lane changes require checking mirrors, checking blind spots by looking over the shoulder, and signaling the intended move before moving over.
- Since entering roundabout traffic must yield to vehicles already circulating, slowing down and watching for a safe gap is the correct approach.
- Because safety corridors have higher serious-crash rates, drivers are encouraged to use headlights on to improve visibility and safety.
- 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
- The eight-sided shape and red color are reserved uniquely for stop signs in the national sign system covered in the Kansas handbook.
- 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.
- The circular yellow sign shape is specifically reserved in the national sign system for advance railroad crossing warnings.
- School zone and school crossing signs use a distinctive fluorescent yellow-green pentagon shape to stand out to drivers.
- Orange is the standard color used for temporary construction and work zone signs, regardless of the specific shape used.
- 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 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 like curves, merges, or crossings ahead.
- The triangular shape is uniquely reserved for Yield signs, telling drivers to slow and give way rather than come to a full stop.
- The five-sided pentagon shape is reserved specifically for school-related warning signs, distinct from all other warning sign shapes.
- 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 manual specifically calls out School Crossing signs with children present as requiring reduced speed.
- A YIELD sign requires slowing down and stopping only if needed to give way to traffic or pedestrians on the intersecting road.
- Yellow warning signage in this context provides an advisory safe speed recommendation for hazards like curves, distinct from a legally binding limit.
- The eight-sided shape is reserved exclusively for stop signs so drivers can recognize it even if the sign face is obscured.
- White rectangular signs with black lettering are the standard shape and color used for regulatory information like speed limits or turn rules.
- 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.
- 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.
- The octagonal red stop sign universally requires a full stop before the driver may proceed when safe.
- Regulatory signs like stop and yield signs establish legally mandated driver actions, distinct from purely informational or warning signage.
- Yellow diamond signs are standard warning signs alerting drivers to hazards or changing road conditions ahead.
- The manual specifies reduced speed limits apply at locations marked with a School Crossing sign when children 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.
- 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
- Kansas seatbelt law makes it a primary violation when a front-seat adult is unbuckled or when a child anywhere in the vehicle is unrestrained, letting police stop a car for that alone.
- Kansas requires all children under age 4 to be secured in an approved child safety seat when riding in a passenger car.
- The Kansas handbook states applicants must score 80% to pass the written knowledge test.
- Kansas offers an online knowledge exam option that lets applicants skip the in-office written test if they bring in proof of passing.
- The Kansas knowledge test has 25 questions covering traffic laws and road sign identification by shape, color, or symbol.
- Kansas law bans only writing, sending, or reading a written communication like texting or email while driving; talking or dialing is not specifically illegal.
- Kansas requires continuous liability insurance; failing to maintain it results in a mandatory indefinite license suspension.
- The licensed supervising driver in the front seat for a Kansas instruction permit holder must be at least 21 years old.
- A 15-year-old restricted license holder in Kansas may not transport any non-sibling minor passengers, with driving limited to specific purposes.
- Kansas's less-restricted stage for 16-year-olds limits unsupervised driving to 5 a.m. to 9 p.m., with certain exceptions.
- A Kansas 16-year-old less-restricted license holder may carry no more than one non-sibling passenger under age 18.
- Violating Kansas license restrictions carries a 30-day suspension for a first conviction, 90 days for a second, and one year for a third or subsequent conviction.
Emergencies
- Kansas law separately requires drivers to move over or slow down for construction workers and vehicles actively working on the road, similar to the emergency vehicle move-over rule.
- Kansas law requires drivers to pull to the right and stop for an approaching emergency vehicle with lights or siren active, and never to follow directly behind it.
- Kansas's move-over law applies to any driver passing a stopped emergency vehicle with lights active, requiring a lane change or reduced speed for safety.
- If a lane change isn't possible or safe, the driver must proceed with due caution and reduce speed to a safe level for conditions.
- The Move Over Law has escalating consequences: a basic violation carries a modest fine and point penalty, a violation causing a crash carries a higher fine, and one causing death or serious injury carries the harshest penalty.
- 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.
- On divided highways of 4+ lanes, drivers should move over a lane away from a stopped emergency vehicle when it can be done safely.
- 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.
- Standard guidance for hydroplaning is to ease off the gas and avoid sudden braking or steering, letting the tires regain contact with the road.
- Safe driving practice, sometimes called a move-over rule, is to give stopped vehicles extra space by changing lanes or slowing down.
- Pumping the brakes can rebuild some pressure, and downshifting uses engine braking to help slow the vehicle safely before using the parking brake carefully.
- 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.
- Rapid brake lights or hazard signals ahead indicate a potential emergency or obstruction, so drivers should slow down and prepare to react safely.
- 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.
- 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 and stopping until the vehicle has passed.
- 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.
- When a safe lane change isn't possible, drivers are generally expected to reduce speed and use caution passing the stopped vehicle.
- 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.
- 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 Kansas DMV practice test, which explains the reasoning behind every answer, or see Kansas DMV facts and fees before test day.