South Dakota: Road signs Practice Test
Warning, regulatory, work zone and guide signs from the South Dakota Driver License Manual, and the THINK signs along the highways.
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Questions are original and based on the official manual "South Dakota Driver License Manual" (Revised 11/2024), South Dakota Department of Public Safety.
All 21 questions in this practice test
Take the test above first, then use this list to study. Tap “Show answer” to see the correct answer and explanation.
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What is the purpose of the "THINK" sign program along South Dakota's highways?
- A memorial to the victim and a reminder of dangerous behaviors
- A marker for work zones on state highways
- A notice of crash statistics posted for each county road
- A guide to rest areas and exits
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Correct answer: A memorial to the victim and a reminder of dangerous behaviors
The signs memorialize a person killed in a crash and remind motorists about dangerous behaviors.
Source: South Dakota Driver License Manual (Revised 11/2024), page 21
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How many "THINK" signs are erected on the state highway for a crash?
- One for each crash
- One for each vehicle involved
- One for each person killed
- One for each mile of the roadway
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Correct answer: One for each person killed
One sign goes up for each person killed in the crash.
Source: South Dakota Driver License Manual (Revised 11/2024), page 21
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How is each "THINK" sign mounted?
- On a shared post with the speed limit sign
- On a separate post near the edge of the right-of-way
- On a bridge or overpass above the road
- In the median of the highway between the opposite lanes
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Correct answer: On a separate post near the edge of the right-of-way
Each sign has its own post near the edge of the right-of-way.
Source: South Dakota Driver License Manual (Revised 11/2024), page 21
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When will a "THINK" sign be expeditiously removed?
- When the next crash occurs at the same location
- When the road is repaved or widened by the state highway crew
- When the speed limit on that road changes
- When an immediate family member of the crash victim objects to it
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Correct answer: When an immediate family member of the crash victim objects to it
A sign is removed promptly if an immediate family member of the crash victim objects.
Source: South Dakota Driver License Manual (Revised 11/2024), page 21
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What happens to all "Think" signs on a section of roadway that is reconstructed to new standards?
- They are moved to a new road
- They are replaced with new signs
- They are removed
- They are covered until work ends
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Correct answer: They are removed
Reconstruction of a roadway segment to new standards removes all THINK signs on it.
Source: South Dakota Driver License Manual (Revised 11/2024), page 21
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Once a "THINK" sign has been removed, when is it replaced?
- Only when an immediate family member of the victim requests it
- Never, under any circumstances
- Whenever the highway department has a spare sign
- After one year, if the road has had no new crashes since then
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Correct answer: Only when an immediate family member of the victim requests it
Removed signs are not replaced unless an immediate family member of the victim requests it.
Source: South Dakota Driver License Manual (Revised 11/2024), page 21
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Besides traffic signals, signs, and pavement markings, whose directions are traffic control devices?
- Law enforcement, highway personnel, and school crossing guards
- Tow truck drivers, delivery drivers, and bus passengers
- Parking lot attendants, store employees, and cashiers
- Crossing pedestrians, taxi drivers, and mail carriers
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Correct answer: Law enforcement, highway personnel, and school crossing guards
Traffic control devices also include directions given by law enforcement, highway personnel, and school crossing guards.
Source: South Dakota Driver License Manual (Revised 11/2024), page 31
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A yellow diamond-shaped sign shows a black car with wavy lines under it. What does the sign warn about?
- Steep Hill
- Curvy Road
- Deer/Animal Crossing
- Slippery When Wet
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Correct answer: Slippery When Wet
This warning sign is labeled Slippery When Wet and warns of a road that may be slick.
Source: South Dakota Driver License Manual (Revised 11/2024), page 33
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A yellow diamond-shaped sign shows 12'-6" between a downward arrow and an upward arrow. What does the sign warn about?
- Lane Ends
- Low Clearance Ahead
- Divided Highway
- Advisory Speed Around Curve
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Correct answer: Low Clearance Ahead
This warning sign is labeled Low Clearance Ahead and tells you the overhead height is limited.
Source: South Dakota Driver License Manual (Revised 11/2024), page 33
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A yellow diamond-shaped sign shows curved arrows chasing each other in a circle. What does the sign warn about?
- Roundabout
- Merging Traffic
- Traffic Signal
- Added Lane
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Correct answer: Roundabout
This warning sign is labeled Roundabout and tells you a roundabout is ahead.
Source: South Dakota Driver License Manual (Revised 11/2024), page 33
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A yellow diamond-shaped sign shows a leaping animal. What does the sign warn about?
- Share the Road with Bicycles
- Pedestrian Crossing
- Deer/Animal Crossing
- Steep Hill
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Correct answer: Deer/Animal Crossing
This warning sign is labeled Deer/Animal Crossing and warns that animals may cross the road.
Source: South Dakota Driver License Manual (Revised 11/2024), page 33
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What do regulatory signs tell you?
- Possible dangers that may be ahead
- Directions to cities and towns
- Specific laws that you must obey
- Locations of rest areas and gas stations
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Correct answer: Specific laws that you must obey
Regulatory signs state specific laws, such as rules for traffic direction, lane use, turning, speed, and parking.
Source: South Dakota Driver License Manual (Revised 11/2024), page 35
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What does a red circle with a red slash over a symbol on a regulatory sign mean?
- It prohibits certain actions
- It recommends a safe action
- It warns of a hazard ahead
- It shows an available service
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Correct answer: It prohibits certain actions
A red circle with a red slash over a symbol prohibits the action the symbol shows.
Source: South Dakota Driver License Manual (Revised 11/2024), page 35
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At a stop sign with a stop line or crosswalk, where must you stop?
- In the middle of the crosswalk
- Just past the stop sign
- Over the line, to see better
- Behind the stop line or crosswalk
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Correct answer: Behind the stop line or crosswalk
You stop behind the stop line or crosswalk if there is one, otherwise before the sign itself.
Source: South Dakota Driver License Manual (Revised 11/2024), page 35
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What does a yield sign mean?
- Stop completely every time before proceeding
- Slow down and yield the right-of-way
- Speed up to merge ahead of traffic
- Stop only if a train is near
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Correct answer: Slow down and yield the right-of-way
A yield sign means you must slow down and give the right-of-way to traffic in the intersection or roadway you are entering.
Source: South Dakota Driver License Manual (Revised 11/2024), page 35
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What does a one-way street sign tell you?
- Traffic may flow both ways past the arrow
- Only slow vehicles may use that street
- Traffic flows only in the direction of the arrow
- Parking is allowed only on the arrow side
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Correct answer: Traffic flows only in the direction of the arrow
A one-way sign shows that traffic goes only the way the arrow points, so you never drive the wrong way.
Source: South Dakota Driver License Manual (Revised 11/2024), page 35
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What are passing areas based on?
- How far you can see ahead
- How many lanes the road has
- The posted speed limit
- The amount of traffic
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Correct answer: How far you can see ahead
Passing areas are set by how far ahead you can see, taking unseen hazards such as hills, curves, and driveways into account.
Source: South Dakota Driver License Manual (Revised 11/2024), page 35
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What do the shape and color of a route number sign indicate?
- The posted speed limit
- The type of roadway
- The distance to the next town
- The number of lanes
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Correct answer: The type of roadway
The shape and color of route number signs show whether a road is an interstate, U.S., state, city, county, or local road.
Source: South Dakota Driver License Manual (Revised 11/2024), page 36
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Which kind of sign shows the location of rest areas, gas stations, campgrounds, or hospitals?
- Service signs
- Destination signs
- Route number signs
- Regulatory signs
Show answer
Correct answer: Service signs
Service signs, blue with white letters or symbols, show where services are located.
Source: South Dakota Driver License Manual (Revised 11/2024), page 36
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A white square sign shows a red circle with a slash over a black letter P. What does it mean?
- Parking for a limited time only
- Loading zone ahead
- Parking lot ahead
- No parking
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Correct answer: No parking
A sign showing a letter P inside a red circle with a slash is the No Parking sign.
Source: South Dakota Driver License Manual (Revised 11/2024), page 43
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The manual shows a fluorescent yellow-green sign with a red downward-pointing triangle above a walking pedestrian figure. What is it labeled?
- School Crossing
- Bicycle Crossing
- Mid-Block Crosswalk
- Pedestrian Signal
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Correct answer: Mid-Block Crosswalk
The manual’s label for the pedestrian yield sign used at mid-block crossings is Mid-Block Crosswalk.
Source: South Dakota Driver License Manual (Revised 11/2024), page 61