What does an octagon-shaped road sign mean on the DMV test?

An 8-sided red octagon is used exclusively for STOP signs (MUTCD R1-1). Even if covered in snow or mud, an octagon always requires a complete stop before the stop line or crosswalk.

What is the difference between a yellow diamond sign and an orange diamond sign?

Yellow diamond signs warn of permanent physical road hazards ahead (curves, intersections, merges), whereas orange diamond signs warn of temporary construction, maintenance, or work zones where fines are frequently doubled.

What does a 5-sided pentagon sign indicate?

A 5-sided fluorescent yellow-green pentagon indicates a School Advance Warning or School Crosswalk ahead (MUTCD S1-1).

Module 2: MUTCD Signs & Markings • FHWA 2026

Visual US Road Signs, Shapes & Pavement Markings

Every state DMV written exam tests your ability to recognize road signs by shape, color, and symbol—and in states like New York, missing more than 2 out of 4 road sign questions is an automatic fail regardless of your overall score. Study every visual sign and exam trap below.

Test Your Sign Knowledge Browse 24 Illustrated Exam Signs

Instant Shape & Color Recognition

8 Official MUTCD Sign Shapes & Color Rules

8-SIDED

Octagon: Stop Only

Exclusively reserved for STOP signs. Requires a complete cessation of movement behind the limit line or crosswalk.

3-SIDED

Downward Triangle: Yield

Slow down, prepare to stop, and give right-of-way to all pedestrians and cross traffic before proceeding.

DIAMOND

Yellow / Orange Diamond

Yellow warns of permanent road hazards (curves, merges). Orange warns of temporary construction & work zones.

5-SIDED

Pentagon: School Zone

Fluorescent yellow-green 5-sided sign marks school zones and school crossings (15–25 mph when children are present).

CIRCLE

Round: Railroad Advance

A circular yellow sign with an X and RR exclusively gives advance warning of a highway-rail grade crossing ahead.

PENNANT

Pennant: No Passing Zone

Mounted on the LEFT side of a two-lane road to warn drivers of the beginning of a solid-yellow No Passing Zone.

VERTICAL

Vertical Rectangle: Law

White vertical rectangles state enforceable traffic laws (Speed Limits, No Parking, Keep Right, Turn Lane Rules).

GUIDE

Green / Blue / Brown

Green = Highway destinations & mileposts; Blue = Motorist services (Gas, Hospital, Rest Area); Brown = Parks & Recreation.

Interactive Visual Reference

24 Illustrated DMV Exam Road Signs & Traps

Lane Lines & Signal Heads

Pavement Markings & Traffic Signal Rules

YELLOW VS. WHITE LINES

Yellow Separates Opposing Traffic; White Separates Same Direction

Broken Yellow Line: You may pass on the left only when the oncoming lane is clear and safe.
Double Solid Yellow Lines: Passing is strictly prohibited in either direction (you may only cross to turn left into/out of a private driveway).
Shared Center Left-Turn Lane: Marked by solid outer yellow lines and dashed inner yellow lines. Used ONLY for turning left (never for passing or driving more than 200–300 feet).

TRAFFIC SIGNAL ARROWS

Flashing Yellow Arrow vs. Solid Red & Green Arrows

Flashing Yellow Arrow: Turning in the direction of the arrow is permitted AFTER yielding to oncoming traffic and pedestrians.
Solid Green Arrow: Protected turn. Oncoming traffic has a red light, though you must still yield to pedestrians in the intersection.
Flashing Red Light: Treat identically to a STOP sign. Come to a complete stop, yield right-of-way, and proceed when safe.