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Traffic Sign Colors, Shapes & Signal Patterns

What the color, shape, and flash pattern of a sign or signal tells you

Traffic signs fall into many categories based on how the sign is used, and some signs fit more than one category. The fastest way to read a sign at a glance is by its color and shape. Both are standardized by the MUTCD, so every driver sees the same meaning everywhere.

Traffic Sign & Signal Colors

Red

Red means stop or prohibition. A red traffic signal requires a full stop. Common red traffic signs include stop signs, yield signs, and do not enter signs; regulatory signs are often red.

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Yellow

Yellow marks a warning sign. Examples include pedestrian crossing signs, BUMP signs, and traffic signal ahead signs.

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Orange

Orange is reserved for construction and work zone signs, such as detour signs, end/begin road work signs, and work zone speed limit signs.

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Green

Green means go, signals a direction, or marks distances. A green traffic light means you may proceed. Common green traffic signs include destination signs, mile markers, and bike route signs.

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Blue

Blue indicates driver information, services, and facilities. Common blue signs include rest stop signs, hospital signs, and interstate highway signs.

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Brown

Brown marks recreational facilities and areas of cultural interest. Brown signs point the way to state parks, camping areas, and historic sites.

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Traffic Sign Shapes

Octagon

The octagonal shape is reserved for one sign only: the stop sign. No other sign may use it, so it reads instantly even from behind.

Diamond

Diamond-shaped signs warn drivers of hazards ahead. They commonly come in yellow for permanent warnings and orange for construction zones.

Rectangle

Rectangular signs are the most common shape. Vertical rectangles carry regulations like speed limits; horizontal rectangles provide guidance and information.

Traffic Signal Patterns

Steady Red

Come to a complete stop and wait for a green light.

Flashing Red

Treat it like a stop sign. All right-of-way laws that apply at stop sign intersections apply here as well.

Flashing Yellow

Proceed with caution. Drivers facing the light have the right of way, but oncoming traffic may face a flashing yellow signal too.

Need MUTCD-Compliant Signs?

Every sign we make uses the correct MUTCD colors, shapes, and reflective sheeting, from single stop signs to full work zone packages.

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