Road sign shapes and meanings follow one national system: an octagon is always STOP, a downward triangle is always YIELD, a diamond is a warning, and a pentagon marks a school zone. Colors add a second clue, such as yellow for warnings, orange for work zones and green for directions. Learn both and you can read most signs before you are close enough to see the words.
Quick answer: what the road sign test is and how it's scored
A road signs test asks you to identify signs by shape, color and symbol and say what they mean. Some states give it as a separate test and others fold sign questions into the written knowledge test. Scoring differs by state, for example:
| State | How signs are tested | Official source |
|---|---|---|
| North Carolina | Separate sign test. Class C applicants must identify 9 of 12 signs | NCDMV testing rule, ncdot.gov |
| Wisconsin | Separate Highway Signs Test: 15 questions, 12 correct to pass | Wisconsin Motorists' Handbook, wisconsindot.gov |
| Indiana | Signs part of the knowledge exam, scored on its own: 80% or higher | Indiana BMV, in.gov/bmv |
| New York | 4 sign questions inside the 20-question test. You must get at least 2 right | New York State DMV, dmv.ny.gov |
Check your own state's agency for its format. The signs themselves are the same everywhere, because every state follows the Manual on Uniform Traffic Control Devices (MUTCD) from the Federal Highway Administration (mutcd.fhwa.dot.gov).
Road sign shapes and meanings
The MUTCD says particular shapes "shall be used exclusively for specific signs or series of signs." Here is the gallery, grouped by shape.
Octagon (8 sides)
- Red with white letters: STOP.
- No other sign uses this shape, so you can recognize it from behind or in snow.
Triangle, point down
- Red and white: YIELD.
- Slow down and stop if needed to let traffic and pedestrians go first.
Diamond
- Yellow with black symbols: a warning.
- Curves, hills, merging traffic, slippery roads, deer and similar hazards ahead.
Pentagon (5 sides)
- School zone or school crossing.
- Usually fluorescent yellow-green. Slow down and watch for children.
Pennant (sideways triangle)
- Yellow: NO PASSING ZONE.
- Posted on the left side of the road, where you would see it while thinking about passing.
Circle
- Yellow with an X and two Rs: railroad crossing ahead.
- This is an advance warning. The crossing itself comes later.
Crossbuck (X shape)
- White X at the tracks: the railroad crossing itself.
- Treat it like a yield sign for trains.
Vertical rectangle
- Usually regulatory: speed limits, turn rules, lane use.
- White signs give rules you must obey.
Horizontal rectangle
- Guide and information signs: green for directions, blue for services, brown for parks and points of interest.
What are the different shapes of road signs?
The main shapes are the octagon (stop), the downward triangle (yield), the diamond (warning), the pentagon (school), the pennant (no passing zone), the circle (railroad crossing ahead), the crossbuck (railroad crossing), the vertical rectangle (rules) and the horizontal rectangle (guide and information). The octagon, triangle, pennant, circle and crossbuck each belong to one sign only.
Road sign shapes and colors: what each color means
| Color | What it means |
|---|---|
| Red | Stop, yield or something you must not do (DO NOT ENTER, WRONG WAY, red circle and slash) |
| White | Regulatory: a rule you must obey, such as a speed limit |
| Yellow | General warning: a hazard or change ahead |
| Fluorescent yellow-green | School, pedestrian and bicycle warnings |
| Orange | Work zones and temporary traffic control |
| Green | Guide signs: directions, exits and distances |
| Blue | Motorist services: gas, food, lodging, hospital |
| Brown | Recreation and cultural sites: parks, historic sites |
| Black | Used with white on some rule signs, such as ONE WAY |
Read shape first, color second, words last. A driver who sees a yellow pennant knows "no passing" long before the letters are readable.
The signs people miss most
From years of teaching new drivers, the misses are rarely STOP or YIELD. They are signs that look alike or that you only see on highways and rural roads:
- NO PASSING ZONE pennant: a yellow sideways triangle on the left side of the road. Do not start a pass here.
- Round yellow railroad sign: the crossing is ahead, not here. Slow down, look and listen.
- Crossbuck: the crossing itself. Yield to any train, and stop if one is coming.
- Pentagon school sign: school zone or crossing. Slow down and expect children.
- Yield sign: you do not always have to stop, but you must let others go first and stop if needed.
- Divided highway begins and divided highway ends: two signs that look alike. On "ends", traffic will soon come toward you with no median.
- Lane ends or merge: the lane you are in is ending, or traffic will join from the side. Adjust speed and make room.
- Keep right of divider: pass on the right side of the median or island ahead.
- Yellow advisory speed plate under a curve sign: the suggested safe speed for that curve, not the posted limit.
- DO NOT ENTER and WRONG WAY: you are about to enter a one-way road or ramp against traffic. Turn around safely.
Practice: road sign shapes quiz
Ten road signs test practice questions. Cover the answers, say each answer out loud, then check.
- Which shape is used only for the stop sign?
- What does a red and white triangle pointing down mean?
- What does a five-sided (pentagon) sign tell you?
- You see a yellow, sideways triangle on the left side of the road. What does it mean?
- A round yellow sign with a black X and two letter Rs means what?
- At a crossbuck with no signals, what must you do?
- A yellow diamond-shaped sign is what kind of sign?
- What color are work zone signs?
- What do blue signs show?
- What do brown signs point to?
Answers
- An octagon (eight sides).
- Yield: slow down, let others go first, and stop if needed.
- You are near a school zone or school crossing.
- No passing zone. Do not start to pass.
- A railroad crossing is ahead.
- Slow down, look both ways and yield to any train. Stop if a train is coming.
- A warning sign about a condition or hazard ahead.
- Orange.
- Motorist services such as gas, food, lodging or a hospital.
- Recreation and cultural places such as parks and historic sites.
How the signs section fits into the full test
On most road signs tests for a permit, signs are a small part of the total, but they are some of the easiest points to lose. People skip them because they think they already know them, then mix up the round railroad sign and the crossbuck, or the pennant and the yield sign. In states that score signs separately, a weak signs score can fail you even with a strong rules score.
Signs also show up inside rules questions, such as what to do at a yield sign or a school zone. Study signs and right of way together.
Road sign FAQ
What are the different shapes of road signs?
Octagon (stop), downward triangle (yield), diamond (warning), pentagon (school), pennant (no passing zone), circle (railroad ahead), crossbuck (railroad crossing), vertical rectangle (rules) and horizontal rectangle (guide and information).
What is the road sign test?
A test where you identify signs by shape, color and symbol and say what they mean. Some states give it separately and some include sign questions in the written knowledge test.
What does an orange sign mean?
A work zone or other temporary traffic control. Slow down and watch for workers and lane changes.
What is the only eight-sided sign?
The stop sign.
Are road signs the same in every state?
Yes, the shapes and colors follow the national MUTCD standard. Rules about how signs are tested differ by state.
