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Missouri driving lesson · Signs, Signals & Markings

Warning signs

A 3-minute lesson from the Missouri course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.

Read time
3 minutes
Course unit
Signs, Signals & Markings
Checkpoint questions
6
Source pages
48, 49

Warning signs are yellow with black lettering or symbols, and usually diamond-shaped. They tell you to slow down and be prepared to stop, because a hazard or special situation is ahead.

Signs about what's ahead

Signs about what's ahead
SignMeaning
Stop AheadStop sign ahead; be prepared to stop
Signal AheadTraffic signal ahead; be prepared to stop
School CrossingSlow down; watch for children crossing
Pedestrian CrossingSlow down; yield to pedestrians in the crosswalk
Exit Speed AdvisoryAdvisory speed for the exit ramp
Handbook p. 48 ↗

Know the rule

The School Crossing sign is being changed to yellow-green; the transition will take effect within the next ten years.

Handbook p. 48 ↗

Lanes and traffic flow

Lanes and traffic flow
SignMeaning
Added LaneTraffic enters in an added lane; no merge needed
MergeTraffic entering; expect vehicles in your lane
Lane Ends/Merge LeftTwo lanes become one; right lane merges left
Begin Divided RoadwayBecomes two-way, divided by a median or barrier
End Divided RoadwayTwo-way traffic no longer divided
Handbook p. 48 ↗

Know the rule

At a Lane Ends/Merge Left sign, if you're in the right lane you must merge left, yielding to traffic in the left lane.

Handbook p. 48 ↗
Merge and lane ends signs
Merge and Lane Ends/Merge Left signs

Curves and turns

Curves and turns
SignMeaning
CurveRecommended speed is below the posted limit
TurnSharp turn; recommended maximum 30 mph or less
Reverse TurnTwo turns in opposite directions; 30 mph or less
Large ArrowOutside of a turn; slow for a sharp change
ChevronExtra emphasis to slow at curves and turns
Handbook p. 49 ↗

Know the rule

In a reverse turn, the second turn may be sharper than the first.

Handbook p. 49 ↗

Know the rule

Curve and turn signs may carry an advisory speed plate showing the recommended speed. You may feel comfortable faster in fair weather, but never exceed it in rain, snow or ice.

Handbook p. 49 ↗
Reverse curve
Reverse Turn sign

Road conditions

Road conditions
SignMeaning
Slippery When WetRoad becomes unusually slippery in wet weather
Object MarkerObject in or near the road; stay in your lane
Soft ShoulderSoft shoulder; don't drive off the pavement
Share the RoadBicycles riding in the same lane as vehicles
Slow Moving VehicleOrange triangle: vehicle going under 25 mph
Handbook p. 49 ↗
Slow-moving vehicle emblem
Slow moving vehicle emblem

Put it into practice

On a rainy night you see a yellow Curve sign with a 35 MPH advisory plate on a road posted at 55. Slow to 35 or less: you should never exceed the advisory speed in rain, snow or ice.

Check your understanding

Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.

You see a yellow diamond sign with a curving arrow and an advisory speed plate below it. What does the advisory plate show?
  1. The legal maximum speed limit for the road
  2. The minimum required speed
  3. The speed limit for trucks only
  4. Recommended safe speed for the curve

Answer: Recommended safe speed for the curve

Curve and turn signs have an advisory speed plate showing the recommended speed for that curve or turn.

Handbook p. 49 ↗
A reflective orange triangle displayed on the rear of a vehicle indicates what?
  1. The vehicle is traveling less than 25 mph
  2. The vehicle is a school bus
  3. The vehicle carries hazardous materials
  4. The vehicle is about to turn

Answer: The vehicle is traveling less than 25 mph

A reflective orange triangle (slow moving vehicle emblem) on the rear of a vehicle means it is traveling less than 25 mph.

Handbook p. 49 ↗
A yellow diamond sign showing two people walking indicates what?
  1. No pedestrians allowed
  2. Pedestrian crossing ahead
  3. A pedestrian bridge is present
  4. A school crossing ahead

Answer: Pedestrian crossing ahead

The pedestrian crossing sign warns you to yield to pedestrians in the crosswalk and slow down.

Handbook p. 48 ↗
What does a 'Lane Ends/Merge Left' sign warn you about?
  1. A new lane is being added for you
  2. The road ends completely ahead
  3. Two lanes merging into one
  4. Traffic from another road will enter

Answer: Two lanes merging into one

This sign warns that two lanes will become one; if you're in the right lane you must merge left, yielding to left-lane traffic.

Handbook p. 48 ↗
What does the 'Object Marker' sign warn drivers about?
  1. A sharp turn ahead
  2. A soft shoulder ahead
  3. A lane ending ahead
  4. Objects near the road

Answer: Objects near the road

Object markers notify drivers of objects in or very close to the edge of the roadway.

Handbook p. 49 ↗
What is the recommended maximum speed indicated by a standard 'Turn' warning sign (a sharp turn)?
  1. 15 mph or less
  2. 30 mph or less
  3. 45 mph or less
  4. 60 mph or less

Answer: 30 mph or less

A turn sign warns of a sharp turn where the recommended maximum speed is 30 mph or less.

Handbook p. 49 ↗
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