A brown panel steers Missouri drivers toward a Katy Trail access point off the highway. What category of destination does that color reserve?

Recreational and cultural areas such as parks, trails, and historic sites

Detour routes around construction

Deer country: along a wooded stretch of Missouri Route 19, a diamond-shaped panel in yellow shows a black animal symbol. How should you read it, and what should change in your driving?

It is a warning sign; slow down and scan the shoulders for the hazard

It is a regulatory sign; the pictured maneuver is now mandatory

It marks a recreation area with wildlife viewing

It advertises motorist services at the next exit

Joining U.S. 63 from a Missouri side road, you face a sign shaped like a triangle resting on its point with a red border. What must you be ready to do before your wheels touch the through lanes?

Give the through traffic the road, slowing or stopping until a safe gap opens

Accelerate immediately, because merging traffic holds priority

Stop and wait a fixed interval regardless of traffic

Sound the horn to claim the lane before entering

The Missouri Driver Guide reserves the pentagon shape for a single purpose, and one stands near a small-town crosswalk ahead of you. What does it mark?

A school zone or school crossing where children may be present

A railroad crossing with active gates

A no-passing zone on a two-lane road

A rest area with picnic facilities

Corn grows tall enough to hide the rails near a Missouri grain elevator, yet a round yellow sign placed far ahead of the crossing tells you what to expect. What does the round shape warn of?

A railroad crossing ahead; slow down, look, and be ready to stop

A sharp curve in the road ahead

The end of pavement and the start of gravel

On a two-lane Missouri farm route at dusk, the center stripe glows yellow in your headlights. What does that color tell you about the traffic beyond it?

It comes toward you; yellow separates opposing flows

It moves in your direction, so lane changes are open

It is restricted to farm machinery

It is a parking lane, not a travel lane

Climbing an Ozark grade behind a loaded grain truck, you find a solid yellow line on your side of the Missouri highway's center. What does that line forbid?

Crossing it to pass; the no-passing restriction applies to your side

Driving faster than the truck under any circumstances

Using headlights on the upgrade

Following the truck closer than one car length

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PRACTICE ENGINE · MISSOURI ROAD SIGNS

Missouri Road Signs Practice Test.
Free practice exam — 50 verified questions, instant feedback.

Written and reviewed by Vincent Ruan, EA, CFP®

Verified against the official content outline August 7, 2026

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QUESTION 1 / 50Road Signs and MarkingsEasy0/0

Dust from a Missouri gravel county road has coated a red, eight-sided panel at the crossroads until its letters are unreadable. What does the shape alone still require of you?

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1. Dust from a Missouri gravel county road has coated a red, eight-sided panel at the crossroads until its letters are unreadable. What does the shape alone still require of you?
- A. Yield only when a vehicle is already in the intersection
- B. Come to a complete stop, then go only when the way is clear
- C. Slow down and roll through if no traffic is visible
- D. Nothing, until the sign is cleaned and legible again
Show answer & explanation
Answer: B
Missouri reserves the octagon for one message: stop. Because no other sign uses eight sides, the shape commands a full stop even when dust or snow hides the letters. Rolling through, yielding conditionally, or waiting for a cleaner sign all ignore a shape that has exactly one legal meaning.
2. A brown panel steers Missouri drivers toward a Katy Trail access point off the highway. What category of destination does that color reserve?
- A. Truck weigh stations
- B. Detour routes around construction
- C. Hospitals and urgent care
- D. Recreational and cultural areas such as parks, trails, and historic sites
Show answer & explanation
Answer: D
Brown backgrounds are set aside for recreational and cultural destinations: state parks, trails, battlefields, and museums. Weigh-station notices use standard regulatory panels, medical services travel on blue signs, and detours around work zones are marked in orange, so each of those readings borrows the wrong color family.
3. Deer country: along a wooded stretch of Missouri Route 19, a diamond-shaped panel in yellow shows a black animal symbol. How should you read it, and what should change in your driving?
- A. It advertises motorist services at the next exit
- B. It marks a recreation area with wildlife viewing
- C. It is a regulatory sign; the pictured maneuver is now mandatory
- D. It is a warning sign; slow down and scan the shoulders for the hazard
Show answer & explanation
Answer: D
Yellow diamonds with black symbols are Missouri's warning family, flagging hazards such as deer crossings before you reach them, and the right response is reduced speed and wide scanning. Regulatory commands come on white rectangles, services ride blue panels, and recreation sites use brown, so those readings misclassify the sign.
4. Joining U.S. 63 from a Missouri side road, you face a sign shaped like a triangle resting on its point with a red border. What must you be ready to do before your wheels touch the through lanes?
- A. Give the through traffic the road, slowing or stopping until a safe gap opens
- B. Sound the horn to claim the lane before entering
- C. Stop and wait a fixed interval regardless of traffic
- D. Accelerate immediately, because merging traffic holds priority
Show answer & explanation
Answer: A
The downward-pointing triangle in red and white is the yield sign, and it puts the burden on you: let the through traffic pass, adjusting speed or stopping entirely until a safe gap appears. Claiming priority by accelerating or by horn reverses the duty, and a fixed-time stop is an invention with no basis in the Missouri Driver Guide.
5. The Missouri Driver Guide reserves the pentagon shape for a single purpose, and one stands near a small-town crosswalk ahead of you. What does it mark?
- A. A no-passing zone on a two-lane road
- B. A railroad crossing with active gates
- C. A school zone or school crossing where children may be present
- D. A rest area with picnic facilities
Show answer & explanation
Answer: C
The five-sided pentagon belongs exclusively to school signs, telling you children may be crossing or walking nearby, so slow down and watch the curbs. Railroad warnings ride a round sign, no-passing pennants use a different shape entirely, and rest areas take blue or brown service-style panels rather than the school pentagon.
6. Corn grows tall enough to hide the rails near a Missouri grain elevator, yet a round yellow sign placed far ahead of the crossing tells you what to expect. What does the round shape warn of?
- A. A school bus loading zone
- B. The end of pavement and the start of gravel
- C. A railroad crossing ahead; slow down, look, and be ready to stop
- D. A sharp curve in the road ahead
Show answer & explanation
Answer: C
Round yellow advance signs carry one message in Missouri: railroad crossing ahead. They are posted far back precisely because crops, buildings, or hills can hide the tracks themselves. Curves take diamond warnings, school areas use the pentagon, and surface changes are announced with worded warning panels, not the circle.
7. Barrels squeeze U.S. 65 traffic into a single Missouri lane where every roadside panel has switched to one color. Which color announces that you are in a work zone?
- A. Green
- B. Blue
- C. Orange
- D. Brown
Show answer & explanation
Answer: C
Orange is the color Missouri devotes to construction and maintenance work zones, covering everything from lane-shift arrows to flagger-ahead warnings. Blue panels point to motorist services, brown marks recreational and cultural sites, and green carries destinations and mileage, so none of them belongs among the barrels.
8. Halfway across the state on I-44, a Missouri driver needs fuel, food, and a motel before nightfall. Panels in which color list those services at the exits?
- A. Yellow
- B. Orange
- C. Blue
- D. Brown
Show answer & explanation
Answer: C
Blue is the service color: gas, food, lodging, hospitals, and camping panels all ride blue backgrounds at Missouri interchanges. Brown would steer you to parks and historic sites, orange means road work rather than rest, and yellow diamonds warn of hazards instead of listing amenities for travelers.
9. On a two-lane Missouri farm route at dusk, the center stripe glows yellow in your headlights. What does that color tell you about the traffic beyond it?
- A. It comes toward you; yellow separates opposing flows
- B. It is restricted to farm machinery
- C. It is a parking lane, not a travel lane
- D. It moves in your direction, so lane changes are open
Show answer & explanation
Answer: A
Yellow center lines divide traffic moving in opposite directions, so the lane beyond that stripe carries vehicles headed at you. White lines are the ones separating same-direction lanes. Nothing about the color reserves the far side for machinery or parking; it simply announces which way the other lane flows.
10. Climbing an Ozark grade behind a loaded grain truck, you find a solid yellow line on your side of the Missouri highway's center. What does that line forbid?
- A. Following the truck closer than one car length
- B. Crossing it to pass; the no-passing restriction applies to your side
- C. Using headlights on the upgrade
- D. Driving faster than the truck under any circumstances
Show answer & explanation
Answer: B
A solid yellow line on your side of the center means passing is prohibited from your direction, usually because hills or curves hide oncoming traffic. It says nothing about lighting or fixed following distances, and it does not cap your speed at the truck's pace; it only bars crossing the line to overtake.
11. Three westbound lanes carry Missouri traffic through Kansas City, divided from one another by broken white stripes. What does the white color confirm about those neighboring lanes?
- A. They are exit-only lanes
- B. They flow the same direction as yours, and the broken pattern permits lane changes
- C. They carry oncoming vehicles
- D. They are reserved for trucks
Show answer & explanation
Answer: B
White lane lines always separate traffic moving in the same direction, and a broken pattern signals that careful lane changes are allowed. Oncoming flows would be fenced off with yellow instead. Exit-only and truck restrictions come from posted signs and symbols, not from the plain white stripe itself.
12. Double solid yellow stripes follow every bend of a winding Missouri river road. What do they prohibit for the drivers on both sides?
- A. Turning across them into any driveway
- B. Using the road at all when it is wet
- C. Crossing them to pass, in either direction
- D. Driving after sunset without an escort
Show answer & explanation
Answer: C
Two solid yellow lines mark a no-passing zone for both directions at once; the winding sightlines are exactly why. Drivers may still cross them to turn into a driveway or field entrance where safe, which is why a blanket turning ban misreads the marking, and the stripes say nothing about darkness or weather.
13. Ahead of a one-lane bridge on a Missouri creek road, a yellow diamond shows a sharp black arrow bending left. What is the sign doing, and what is your best response?
- A. Warning of a sharp change in the road ahead; slow down before you reach it
- B. Marking a scenic overlook for photographs
- C. Ordering an immediate stop on the spot
- D. Promising that passing is legal through the curve
Show answer & explanation
Answer: A
A yellow diamond with a black arrow is a warning: the road bends sharply ahead, so shed speed before entering the curve rather than braking in the middle of it. Warning signs advise but do not command stops, they never authorize passing, and scenic viewpoints are marked with brown recreational panels instead.
14. A white X-shaped crossbuck reading RAILROAD CROSSING stands at an ungated Missouri farm crossing. What does it legally function as?
- A. A guarantee that trains no longer use the line
- B. A yield sign for the tracks; any approaching train has the right-of-way
- C. A requirement that every vehicle stop at all times, even with no train in sight
- D. A decorative marker with no legal force
Show answer & explanation
Answer: B
The crossbuck works as a yield sign for the railroad: slow, look both ways, and give any train the road, stopping when one approaches. It carries real legal force, and an ungated crossing is never proof a line is abandoned. Only certain vehicles such as school buses must stop at every crossing regardless of traffic.
15. You and a pickup brake to a halt at the same instant at a Missouri county four-way stop, sitting on crossing routes. Which driver does the tiebreaker favor?
- A. Whichever vehicle is larger goes first
- B. The driver who honks first
- C. The driver on the right; the one on the left yields
- D. Both must wait for a third vehicle to arrive
Show answer & explanation
Answer: C
At an all-way stop the first vehicle to arrive goes first, and a dead-even arrival is settled by position: yield to the driver on your right. Vehicle size and horn use have no standing in Missouri right-of-way law, and waiting for more traffic to appear would simply gridlock the intersection.
16. A minivan reached the Missouri four-way stop well ahead of you from the crossing road. Under the first-vehicle rule, when does your turn come?
- A. Whenever you can accelerate faster than the minivan
- B. Immediately, because through traffic outranks turning traffic
- C. After the minivan has cleared the intersection, since it arrived first
- D. Never; you must find another route
Show answer & explanation
Answer: C
Order of arrival controls an all-way stop: the minivan stopped first, so it proceeds first, and your turn follows once it has cleared. Beating another driver off the line is not a right-of-way method, and neither the type of movement nor vehicle position overrides a clearly earlier arrival.
17. Waiting on a green ball to turn left into a Missouri grocery lot, you face a steady line of oncoming cars. What does the law require before you commit to the turn?
- A. Flash your headlights, then take the lane
- B. Back up and choose a different entrance
- C. Yield to the oncoming traffic and turn only when a safe gap opens
- D. Turn immediately; green grants left turns priority
Show answer & explanation
Answer: C
A plain green light lets you enter the intersection, but a left turn across traffic still yields: oncoming vehicles hold the right-of-way until a genuine gap appears. Headlight flashes transfer nothing, and green never hands a turning driver priority over the through lanes facing them, so patience is the legal answer.
18. Morning riders climb aboard a bus flashing red on an undivided Missouri route as you approach from the facing direction. Does the stop requirement reach your lane?
- A. No, the rule binds only traffic behind the bus
- B. Only if a police officer is present to direct traffic
- C. No, as long as you slow to walking pace while passing
- D. Yes; on an undivided roadway both directions must stop for the lights and stop arm
Show answer & explanation
Answer: D
Missouri's school bus rule stops traffic from both directions on an undivided road whenever the red lights flash and the stop arm is out; approaching head-on does not exempt you. Creeping past at low speed is still passing, and the duty exists whether or not an officer happens to be watching the stop.
19. A depressed earthen divider runs between the halves of U.S. 63 in Missouri. On the far carriageway a school bus displays its flashing red stop lights. What does Missouri law require of you?
- A. No; on a divided highway the opposite direction is not required to stop
- B. Only at night, when children are harder to see
- C. Yes, every lane within sight of a bus must stop
- D. Yes, but only the lane nearest the median
Show answer & explanation
Answer: A
The both-directions stop applies on undivided roads. When a physical divider such as a grass median separates the roadways, traffic on the far side from the bus may continue, while everything behind the bus still stops. Partial-lane and nighttime versions of the rule are inventions; the divider is what matters.
20. Siren rising, a Missouri State Highway Patrol cruiser fills your mirror on a rural stretch of Route 63. What response does the law demand?
- A. Change nothing; emergency vehicles weave around traffic
- B. Pull to the right edge of the road and stop until it has passed
- C. Stop dead in your lane, wherever you are
- D. Speed up to stay ahead of it
Show answer & explanation
Answer: B
An emergency vehicle running lights and siren gets the road: move right, clear the travel lane, and stop until it is by. Outrunning it is illegal and dangerous, freezing mid-lane blocks the very path it needs, and assuming it will thread around you shifts your legal duty onto the emergency driver.
21. Easing out of a farm driveway onto a Missouri gravel county road, what do you owe the traffic and any walkers already using that road?
- A. A yield to vehicles but not to pedestrians
- B. Only a horn tap as a warning
- C. Nothing, because rural roads have no right-of-way rules
- D. The full right-of-way; yield to all of them before entering
Show answer & explanation
Answer: D
A driver entering a roadway from a driveway, alley, or private lane holds the lowest priority: everything already on the road, on foot or on wheels, goes first. Right-of-way law applies on gravel county roads exactly as on pavement, and a horn warning never substitutes for actually giving way.
22. A Missouri gravel lane tees into a paved through highway with no signs posted at the junction. Which driver must give way?
- A. The highway driver, because gravel roads are harder to stop on
- B. The driver on the terminating lane yields to traffic on the through road
- C. The second driver to arrive, no matter which road they are on
- D. Neither; both proceed and sort it out by eye contact
Show answer & explanation
Answer: B
At a T-intersection the road that dead-ends is the minor movement: its driver yields to everything on the through highway, signs or not. Arrival order does not override that geometry, surface type grants no priority, and eye-contact negotiation is a courtesy, never a rule you can rely on.
23. As you set up a right turn at a Missouri small-town corner, a walker steps into the unmarked crosswalk your path crosses. Who proceeds first?
- A. The pedestrian, but only if carrying a flag
- B. The pedestrian; crosswalks exist at intersections whether painted or not
- C. You, because vehicles outrank foot traffic
- D. Whoever is moving faster at the moment
Show answer & explanation
Answer: B
Legal crosswalks exist at intersections even without paint, and a pedestrian within one has the right-of-way over a turning vehicle. Speed and vehicle status create no priority, and no equipment requirement attaches to walking across a corner. Finish the turn only after the walker is clear of your path.
24. Traffic already circulates in the roundabout as you reach its entry on a Missouri afternoon. To whom must you yield before entering?
- A. The vehicles already circulating; enter when a gap opens from your left
- B. Traffic approaching the roundabout from the opposite entrance
- C. No one; entering traffic controls a roundabout
- D. Only trucks and buses inside the circle
Show answer & explanation
Answer: A
Roundabouts run on one rule: vehicles already in the circle have the right-of-way, and entering drivers wait for a gap in the flow coming from their left. Priority does not depend on vehicle type, and drivers still outside at other entrances hold no claim over you; only the circulating traffic does.
25. Rolling down the I-70 entrance ramp near Kingdom City, Missouri, you watch the ramp lane taper away. Who holds priority where it ends, you or the through traffic?
- A. The through traffic; adjust your speed on the ramp to slot into a gap
- B. Neither; a strict alternating pattern is required by law
- C. You, because merging vehicles set the pace
- D. The through traffic must exit to make room
Show answer & explanation
Answer: A
Traffic already established on the highway holds the right-of-way, so the merging driver's job is to use the ramp to match speed and choose a gap before the lane runs out. Courteous drivers often adjust, but nothing obliges them to exit or alternate, and a merging car never sets the highway's pace by right.
26. Trailing a hay wagon on a dry Missouri highway, you pick a fence post and start counting when the wagon's rear passes it. What count means your gap is adequate?
- A. No count is needed if you can see over the wagon
- B. At least three seconds before your front bumper reaches the post
- C. Half a second, provided your brakes are new
- D. A one-second count, since wagons stop slowly anyway
Show answer & explanation
Answer: B
The three-second count is the working minimum on a dry road: when the wagon's rear passes your fence post, your front bumper should not arrive before you count three. A second or less leaves no reaction room even with fresh brakes, and seeing over a vehicle does nothing to shorten your stopping distance.
27. After overtaking a combine on a straight Missouri two-lane, what confirms it is safe to return to the right lane?
- A. Feeling your car reach the posted limit
- B. Seeing the whole combine in your rearview mirror
- C. A guess that you have traveled far enough
- D. Hearing the combine sound its horn
Show answer & explanation
Answer: B
The standard test is visual: when the entire vehicle you passed appears in your rearview mirror, you have room to move back without cutting it off. Guesswork and speed readings measure nothing about clearance, and the passed driver's horn is neither required nor a reliable signal that space exists.
28. A MoDOT truck sits on the I-70 shoulder with amber lights strobing, and the lane to your left is open. What does Missouri's move-over expectation ask of you?
- A. Move over a lane away from the stopped vehicle, or slow down if you cannot
- B. Sound your horn while passing to alert the crew
- C. Continue exactly as you were; shoulders are separate from the road
- D. Stop behind the truck and offer help
Show answer & explanation
Answer: A
When workers or emergency crews are stopped on the shoulder with lights active, the expectation is to vacate the adjacent lane when it is open, and to slow substantially when it is not. Stopping on an interstate to help creates a new hazard, and a horn blast protects no one standing on the ground.
29. River fog erases the lane lines on a Missouri bridge crossing while the posted number stays where it always was. What speed does the law actually allow here?
- A. Only a speed reasonable for the conditions, even if far below the posted limit
- B. Any speed, since fog suspends enforcement
- C. The posted limit, which is always lawful
- D. Whatever keeps up with the car ahead
Show answer & explanation
Answer: A
Posted limits set a ceiling for good conditions, not a guarantee. In fog the basic speed rule takes over: you may drive only as fast as is reasonable and prudent for what you can actually see and stop within. Matching another driver's pace or leaning on the posted number defends nothing if conditions made it unsafe.
30. Loose gravel on a Missouri county road lets tires slide long before they grip. How should the speed you choose relate to the limit that applies there?
- A. Exceed it slightly to skim across the loose surface
- B. Match it precisely; limits already account for gravel
- C. Ignore it; gravel roads are unregulated
- D. Stay well below it, matching the reduced traction
Show answer & explanation
Answer: D
Gravel lengthens stopping distances and loosens steering, so a prudent driver runs well under whatever limit applies, especially before curves and crossroads. Limits do not adjust themselves for surface, no physics rewards speeding across loose rock, and every public road in Missouri remains subject to speed law.
31. Hoping to drive home from a Lake of the Ozarks party, a guest downs black coffee and stands under a cold shower. What do those remedies do to blood alcohol?
- A. A cold shower burns the alcohol off through the skin
- B. Nothing; only the passage of time lowers blood alcohol concentration
- C. Together they neutralize it completely
- D. Coffee cuts it roughly in half
Show answer & explanation
Answer: B
The liver clears alcohol on its own schedule, and nothing sold at a bar or found in a bathroom speeds it up. Coffee produces a wide-awake impaired person, and a cold shower a wet one; neither touches the concentration in the blood. The only genuine remedy is time, which is why arranging a ride is the real fix.
32. A summer downpour glazes U.S. 54 in Missouri and your steering suddenly goes light at highway speed. What is happening, and what should you do first?
- A. A tire has burst; brake as hard as possible
- B. The power steering has failed; pull the parking brake
- C. You are hydroplaning; ease off the accelerator and keep the wheel steady
- D. Nothing unusual; accelerate through the water
Show answer & explanation
Answer: C
A light, floating wheel in heavy rain means the tires are riding a film of water instead of pavement. The recovery is gentle: lift off the gas, hold the wheel steady, and let the tires reconnect. Hard braking or a yanked parking brake can spin the car, and adding speed deepens the very problem.
33. Fresh cold-patch, shifted lanes, and workers on foot complicate a Missouri work zone before any reduced limit even appears. How do you pick a lawful speed through it?
- A. Use the limit posted before the zone, since nothing lower is shown
- B. Hold your cruise-control setting to stay predictable
- C. Follow the largest truck at its exact speed
- D. Scale down to the conditions: the surface, the alignment, and the people working
Show answer & explanation
Answer: D
Work zones concentrate hazards, so the reasonable-and-prudent standard demands a speed suited to rough surface, altered lanes, and exposed workers, whether or not a lower number is posted yet. Cruise control resists the quick adjustments zones require, and neither the old limit nor another vehicle's pace measures the danger around you.
34. Sleet slicks a Missouri overpass while you follow a salt truck spreading its load. How should your normal three-second following gap change?
- A. Shrink it so the spray marks your path
- B. Abandon counting and rely on brake lights
- C. Keep it identical; the count works in all weather
- D. Stretch it well beyond three seconds to match the longer stopping distance
Show answer & explanation
Answer: D
Three seconds is the fair-weather floor. On ice-prone surfaces like overpasses, stopping distances multiply, so the gap must grow substantially, and following a working salt truck adds spray and sudden slowdowns to the mix. Tucking in close or trusting brake lights alone leaves nothing in reserve when the truck stops short.
35. No moon and no streetlights: on an unlit Missouri farm road, what caps your maximum safe speed regardless of the posted figure?
- A. The horsepower of your engine
- B. Your familiarity with the road from daytime trips
- C. The speed of the last car you saw
- D. Your ability to stop within the distance your headlights reveal
Show answer & explanation
Answer: D
At night the road effectively ends where your headlight beams do; driving faster than lets you stop within that lit distance is overdriving your headlights. Daytime familiarity cannot reveal tonight's deer or stalled wagon, and neither engine capability nor another driver's pace changes what you can actually see and stop within.
36. Below a curve warning on a twisting Missouri river road hangs a smaller panel suggesting a lower speed. How should you treat that advisory number?
- A. As obsolete once your tires are rated for highways
- B. As the recommended maximum for the curve in good conditions, and slower when they worsen
- C. As a minimum you must exceed to hold traction
- D. As advice that applies only to trucks
Show answer & explanation
Answer: B
Advisory panels under warning signs recommend the top comfortable speed for that feature in dry, clear conditions; rain, gravel, or darkness argues for even less. They are not minimums, they apply to all vehicles, and tire ratings do not repeal the geometry of the curve that prompted the advisory in the first place.
37. The first cold snap of a Missouri winter arrives. Why does the deck of a bridge glaze over before the pavement leading up to it?
- A. Cold air moves above and below the deck, so it loses heat faster and freezes first
- B. Bridge concrete is chemically slicker
- C. Salt trucks are prohibited from treating bridges
- D. Rivers warm the deck and melt frost onto it
Show answer & explanation
Answer: A
Ordinary pavement draws warmth from the ground beneath, but a bridge deck is exposed to cold air on every surface, so it reaches freezing before the road on either approach. That is a heat-transfer fact, not a chemistry or maintenance quirk, which is why slowing before bridges in a cold snap is basic winter craft.
38. Rolling far under the flow on a clear Missouri interstate, a driver stacks up a long queue behind them. Can driving too slowly itself be a problem under the law?
- A. No; slower is always the safer and legal choice
- B. Only for commercial vehicles
- C. Yes; impeding the normal flow of traffic is a hazard and can be a violation
- D. Only during posted rush hours
Show answer & explanation
Answer: C
Speed law cuts both ways: a driver crawling far below the reasonable flow on a clear interstate creates passing pressure and rear-end risk, and impeding traffic can draw a citation of its own. The duty binds all vehicle types at all hours; the cure is to keep right and travel at a reasonable pace for conditions.
39. The rear of your car drifts toward the ditch on a wet Missouri clay road. Where do you steer, and what happens with the pedals?
- A. Steer opposite the slide and brake hard
- B. Lock the brakes and hold the wheel straight
- C. Steer where you want the front of the car to go and stay off both pedals until grip returns
- D. Accelerate sharply to pull out of the slide
Show answer & explanation
Answer: C
Skid recovery is calm hands and idle feet: look and steer where you want the car to travel, avoiding both hard braking and sudden throttle until the tires bite again. Slamming brakes locks the wheels and extends the slide, while abrupt acceleration on wet clay simply spins the drive wheels and deepens the rotation.
40. Leaving a Springfield wedding reception, a 35-year-old Missouri driver registers 0.08 on the breath test. How does that reading sit against the per se limit?
- A. Comfortably legal; the line sits far higher
- B. Legal, because food was served at the event
- C. Legal, so long as the drive home is short
- D. It meets the limit: at 0.08, driving is unlawful per se, with no proof of bad driving needed
Show answer & explanation
Answer: D
The per se threshold for a noncommercial adult driver is 0.08: at that concentration the offense is complete without any showing of erratic driving. Food, trip length, and how steady the driver feels change absorption stories, not the legal line, so this reading places the driver squarely at the threshold.
41. Hauling freight across Missouri in a rig that requires a CDL, at what blood alcohol reading does the stricter commercial threshold arrive?
- A. The same 0.08 as every other adult driver
- B. 0.02
- C. 0.04
- D. 0.10
Show answer & explanation
Answer: C
Commercial drivers answer to a tighter standard: 0.04 while operating a commercial vehicle, half the ordinary adult figure. The 0.08 line still governs the same person in a private car, which is the trap in assuming one number follows the license holder everywhere; behind the wheel of the rig, 0.04 is the ceiling.
42. Lawfully arrested on Route 65, a Missouri driver waves off the chemical test entirely. What does the implied-consent principle attach to that refusal?
- A. A reward of dismissed charges for lack of evidence
- B. A short delay while a warrant is mailed
- C. An automatic license suspension; driving itself was the consent
- D. Nothing, since tests are voluntary
Show answer & explanation
Answer: C
By driving on public roads, motorists have already consented to chemical testing after a lawful arrest; refusing triggers an automatic suspension that operates independently of the criminal case. Far from erasing the prosecution, refusal adds a separate penalty, and no mailed-warrant grace period exists to soften it.
43. Two beers in and still under 0.08, a Missouri driver assumes the per se number acts as a shield. Can observable impairment alone still support an arrest?
- A. No; below the number, driving is untouchable
- B. Only if a crash has already happened
- C. Yes; impaired driving is chargeable below the per se figure when ability is visibly affected
- D. Only on holiday weekends with checkpoints
Show answer & explanation
Answer: C
The per se figure is one route to a charge, not a safe harbor beneath it. If alcohol visibly degrades driving, an arrest can follow at lower readings, particularly when weaving, delayed reactions, or field tests document the impairment. No crash requirement or calendar exception narrows that principle.
44. A lawful prescription leaves a Missouri driver heavy-lidded on a long overnight haul. Does legally obtained medicine excuse impaired driving?
- A. No; impairment counts regardless of whether the substance was legal
- B. Only illegal drugs can impair a driver
- C. Yes; a pharmacy label is a complete defense
- D. Yes, if the dose matched the bottle
Show answer & explanation
Answer: A
Impaired-driving law cares about the state of the driver, not the paperwork behind the substance. Prescription sedation, over-the-counter drowsiness, and alcohol are treated alike once they degrade attention and reaction time. A correct dose taken lawfully still obliges the driver to stay off the road while affected.
45. Long before slurred speech appears, the first drinks of an evening dull one driving-critical ability. Which goes first, as the Missouri Driver Guide's impairment chapter teaches?
- A. Muscle strength
- B. Judgment, which is why drinkers rate themselves as fine to drive
- C. Hearing
- D. Color vision
Show answer & explanation
Answer: B
Alcohol works from the top down: judgment and self-assessment erode with the earliest drinks, well ahead of visible clumsiness or slurring. That sequencing is what makes impaired driving insidious, since the faculty needed to decide whether to drive is the first casualty. Strength, hearing, and color vision degrade later, if at all.
46. Past midnight in a Missouri railroad town, Main Street's only traffic light blinks red at your approach. What does Missouri expect before you continue?
- A. Like a stop sign: stop completely, then proceed when the way is clear
- B. As decorative lighting with no legal force
- C. Like a green light, since traffic is light
- D. As an order to wait until it cycles to green
Show answer & explanation
Answer: A
A flashing red signal is a stop sign in electric form: come to a complete stop, yield as required, and continue when safe. It will not cycle to green, so waiting for one strands you at the line, and the hour or emptiness of the street never converts a flashing red into permission to roll through.
47. Dry pavement and a comfortable stopping distance ahead, then the Jefferson City signal flips to steady yellow. What is it announcing, and what should you do?
- A. The green will return shortly; maintain speed
- B. Accelerate hard to beat the change
- C. Cross traffic has been released early; swerve clear
- D. The light is about to turn red; stop, since you can do so safely
Show answer & explanation
Answer: D
Steady yellow announces that red is imminent. With dry pavement and room to brake, the correct move is to stop; the light is a warning to clear or avoid the intersection, not a challenge. Racing the change invites entering on red, and yellow certainly does not promise a fresh green or release cross traffic early.
48. The beacon hung above a Missouri fire-station driveway pulses yellow as you approach along the state route. What is that flashing color asking of you?
- A. Nothing; beacons apply only to fire trucks
- B. A U-turn away from the station
- C. A complete stop until it goes dark
- D. Slow down and continue with heightened caution
Show answer & explanation
Answer: D
A flashing yellow beacon means caution: reduce speed, sharpen your scan, and be ready for apparatus pulling out of the station. It does not demand a full stop the way flashing red would, and it addresses every passing driver, not just emergency vehicles. Turning around is nowhere among its meanings.
49. A Missouri teen maps out the graduated licensing path this spring: at what age can the instruction permit be issued, and how long must it be held before the intermediate license?
- A. 15, with no minimum holding period
- B. 14, held for 90 days
- C. 15, held at least 182 days before moving up
- D. 16, held for a full year
Show answer & explanation
Answer: C
Missouri issues the instruction permit at 15, and the permit must be held a minimum of 182 days, counted from the day after issuance, before the intermediate license is available. Earlier ages, shorter waits, and wait-free versions of the path all misstate the graduated system's two anchor numbers.
50. What is the published format of Missouri's written knowledge exam for a first-time license applicant?
- A. 50 questions, with 20 misses allowed
- B. 25 questions, with up to 5 misses allowed under the 80 percent passing bar
- C. 100 questions, none of which may be missed
- D. 10 questions, all of which must be correct
Show answer & explanation
Answer: B
The Missouri written test runs 25 questions and requires 80 percent, which works out to a maximum of 5 missed answers. The longer and stricter formats floating around belong to other states or other license classes; for the standard Missouri knowledge exam, 25 questions and 5 allowable misses is the arithmetic to remember.

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Key facts: Missouri Road Signs exam

MCQ questions

80% (20 of 25 correct)

To pass

Exam fee

The Missouri Road Signs is administered by Missouri Department of Revenue (Driver License Bureau), with 25 scored questions and a 80% (20 of 25 correct) result.

This free Missouri Road Signs practice test has 50 original questions written to Missouri Department of Revenue (Driver License Bureau)'s official content outline, last checked against it on August 7, 2026. Every question shows a worked explanation, and nothing here requires a signup.

As of 2026, the Missouri Road Signs exam fee is $0 (written knowledge test; road-sign test is a separate part).

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Official sources

Every exam fact on this page traces to a primary document published by the body that administers the exam.

Missouri Graduated Driver License LawMissouri Department of Revenuedor.mo.gov
Driver License FAQs - GeneralMissouri Department of Revenuedor.mo.gov
Driver Examination — Frequently Asked QuestionsMissouri State Highway Patrolapps.mshp.dps.mo.gov

Last verified against the official exam content outline: August 7, 2026

Frequently asked questions

Is this practice test the same as the real Missouri exam?

It mirrors the format and topic mix rather than copying secure test items: multiple-choice questions on signs, signals, markings, right-of-way, speed, and alcohol, all grounded in the Missouri Driver Guide. The real exam runs 25 questions with an 80 percent passing bar; this bank runs 50 so you get broader coverage of the same material.

What score should I aim for on practice tests before booking the real one?

Clear the real exam's 80 percent bar comfortably and repeatedly across the entire 50-question bank, not just on one lucky run. Consistency across every category, especially signs and right-of-way, predicts a pass far better than a single high score.

Which topics should I drill hardest if I am short on time?

Sign shapes and colors are the fastest points to lock in, followed by the school bus rule, four-way stop order, and the alcohol thresholds. Those areas dominate both this bank and the state exam, and they reward pure memorization more than any other section.

Does the Missouri exam test the licensing numbers themselves?

Expect at least a question or two on the graduated license system: the permit age of 15, the 182-day holding period, the supervised-hour requirements, and the intermediate restrictions all appear in the Missouri Driver Guide and are fair game on the written test.