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Lesson 3 of 17 · Chapter 4: Traffic Control

Sign shapes and colors

New York signs tell you their job by color and shape before you can read a word. Learn the families (white regulation, yellow warning, green destination and blue service), what STOP and YIELD require, and how to drive through a work area.

Topic
Road signs
Key points
10
Numbers
1
Manual
Chapter 4
What you must know

Key points

  1. Regulation signs are normally white rectangles with black letters or symbols, though some have other shapes or use red.

    Source: Chapter 4
    “REGULATION SIGNS normally are white rectangles with black letters or symbols, but some are different shapes, and some can use red letters or symbols.”
    New York State Driver's Manual, Chapter 4
  2. Warning signs are normally yellow diamonds with black letters or symbols.

    Source: Chapter 4
    “WARNING SIGNS normally are yellow and diamond-shaped, with black letters or symbols.”
    New York State Driver's Manual, Chapter 4
  3. Destination signs are green with white letters and symbols.

    Source: Chapter 4
    “DESTINATION SIGNS are green with white letters and symbols.”
    New York State Driver's Manual, Chapter 4
  4. Service signs are blue with white letters and symbols.

    Source: Chapter 4
    “SERVICE SIGNS are blue with white letters and symbols.”
    New York State Driver's Manual, Chapter 4
  5. At a STOP sign, come to a full stop, yield to vehicles and pedestrians in or heading toward the intersection, and go when it is safe.

    Source: Chapter 4
    “Come to a full stop, yield the right-of-way to vehicles and pedestrians in or heading toward the intersection. Go when it is safe.”
    New York State Driver's Manual, Chapter 4
  6. Stop before the stop line if there is one; if not, stop before you enter the crosswalk.

    Source: Chapter 4
    “You must come to a stop before the stop line, if there is one. If not, you must stop before you enter the crosswalk.”
    New York State Driver's Manual, Chapter 4
  7. At a YIELD sign, slow down, be ready to stop and yield, and come to a full stop if traffic requires it.

    Source: Chapter 4
    “Decrease speed as you reach the intersection. Prepare to stop and yield the right-of-way to vehicles and pedestrians in or heading toward the intersection. You must come to a full stop at a YIELD sign if traffic conditions require it.”
    New York State Driver's Manual, Chapter 4
  8. A red circle with a slash over a symbol means the action shown, like a right turn, is not allowed, or some vehicles are restricted.

    Source: Chapter 4
    “Some regulation signs have a red circle with a slash over a symbol. This indicates that an action, like a right turn, is not allowed or that some vehicles are restricted from the road.”
    New York State Driver's Manual, Chapter 4
  9. A yellow and black recommended speed sign joined to a warning sign means a reduced speed is advised there.

    Source: Chapter 4
    “Sometimes a warning sign is joined with a yellow and black "recommended speed" sign. This indicates reduced speed is advised in that area.”
    New York State Driver's Manual, Chapter 4
  10. In a work area a speed limit as low as 25 mph can be posted, and even without one you must slow down.

    Source: Chapter 4
    “A work area speed limit as low as 25 MPH (40 km/h) can be posted. Even if no speed limit is provided, you must drive at a reduced speed through the work zone”
    New York State Driver's Manual, Chapter 4
Exact figures

Numbers to know

NumberWhat it meansManual
25 mphlowest work area speed limit that can be postedChapter 4
Signs in this chapter

Recognize these signs

  • Stop sign
    Stop
  • Yield sign
    Yield
  • No left turn (red circle and slash) sign
    No left turn (red circle and slash)
  • Speed limit (regulation sign) sign
    Speed limit (regulation sign)
  • Traffic signal ahead (warning sign) sign
    Traffic signal ahead (warning sign)
  • Road work ahead (work area sign) sign
    Road work ahead (work area sign)
  • Hospital (service sign) sign
    Hospital (service sign)
Check yourself

3 questions from the New York practice test

  1. 1. This red octagonal sign is ahead. What must the driver do?

    Red octagon STOP sign
    1. Slow down and continue if the lane looks empty
    2. Stop only if a pedestrian is visible
    3. Come to a complete stop, yield, and go when safe
    4. Yield without stopping unless cross traffic is close
    Show answer

    Come to a complete stop, yield, and go when safe. A red octagon is the STOP sign, which requires a full stop before the stop line, crosswalk, or intersection as applicable. An empty-looking lane does not remove the stopping requirement. The pedestrian-only choice is too narrow because the driver must also yield to vehicles in or approaching the intersection. After stopping, scan for traffic and pedestrians, yield as required, and proceed only when the movement is safe. The octagonal shape is the immediate visual cue that a complete stop comes first.

  2. 2. What does a yellow diamond sign normally warn a New York driver about?

    1. A service area with fuel and lodging
    2. A hazardous location or a location with a special rule ahead
    3. A mandatory speed or parking command
    4. A destination and its travel distance
    Show answer

    A hazardous location or a location with a special rule ahead. New York uses yellow diamond warning signs to alert drivers to a hazardous location or a location with a special rule. The sign is advance information, so it gives the driver time to reduce speed, position the vehicle, or prepare for a change. Blue service signs point to facilities, white regulation signs state commands, and green destination signs guide travel. When the yellow diamond appears, read the symbol and adjust before reaching the feature rather than treating it as permission or a parking instruction.

  3. 3. What kind of New York sign is the white rectangular speed-limit sign shown?

    White SPEED LIMIT 50 sign
    1. A yellow warning sign for a roadway hazard
    2. A green destination sign giving directions
    3. A blue service sign for a facility
    4. A regulatory sign stating a traffic rule
    Show answer

    A regulatory sign stating a traffic rule. New York classifies the white rectangular speed-limit display as a regulation sign. Regulation signs communicate rules that govern traffic, unlike yellow warning signs, green destination signs, or blue service signs. The posted number sets a legal maximum, but a driver still needs to reduce speed when weather, visibility, traffic, or road surface makes that limit unsafe. The visual cue is the plain white rectangle with dark lettering or symbols. Treat it as an instruction to obey, not merely advice about a possible hazard.

Next step

Practice this topic

Lock it in with road signs questions from the free New York practice test. Every answer comes with a plain English explanation.

Source: the New York State Driver's Manual, Chapter 4: Traffic Control. This lesson is a plain English summary, not the law itself; where it differs, the manual and the statute govern. Last checked 2026-09-27.