Like many South American countries, the road signs in Brazil are strongly based on the US MUTCD standard, but with text in Portuguese. The regulatory, prohibitory and mandatory signs are all of them white circular with red borders, with the exception of the stop and the yield sign. The warning signs are yellow diamonds (or orange when used on road works). Units are expressed in compliance with the International System of Units.

Brazil signed the Vienna Convention on Road Signs and Signals on November 8, 1968, but has yet to fully ratify it.^[1]

Warning signs

A-1a Sharp Curve to Left	A-1b Sharp Curve to Right	A-2a Bend to Left	A-2b Bend to Right	A-5a S-curve to Left	A-5b S-curve to Right
A-6 Crossroads	A-7a Side Road to Left	A-7b Side Road to Right	A-12 Circle Road	A-14 Traffic Signal Ahead	A-17 Bumpy Roadway
A-18 Bump	A-20a Steep Descent	A-24 Roadwork	A-28 Slippery Road	A-32a Pedestrian	A-33a School children Crossing
A-39 Uncontrolled Railroad Crossing	A-40 Controlled Railroad Crossing	A-41b Railroad crossing	A-3a Winding road to left	A-3b Winding road to right	A-4a Winding road to left
A-9 Y-junction	A-10a Oblique road branch to left	A-10b Oblique road branch to right	A-11a Successive opposite intersections (left first)	A-11b Successive opposite intersections (right first)	A-12 Roundabout ahead
A-13a Merging traffic from left	A-13b Merging traffic from right	A-15 Stop ahead	A-19 Dip	A-45 Dead end	A-25 Two-way traffic ahead
A-42a Divided highway start	A-42b Divided highway end	A-42c Pass on both sides	A-21a Road narrows on both sides	A-21b Road narrows to left	A-21c Road narrows to right
A-21d Road widens to left	A-21e Road widens to right	A-22 Narrow bridge	A-30a Bike	A-46 Maximum weight	A-29 Loose road
A-32b Pedestrian crossing	A-33b School crossing	A-35 Domestic animals crossing	A-36 Wild animals crossing	A-37 Maximum height	A-26a One-way traffic flow to right
A-26b Two-way traffic flow	A-27 Rock Fall	zebra crossing	A-34 Playground ahead	A-48 Maximum length	A-38 Maximum width
A-30b Bicycle crossing	A-20b Steep ascent	A-43 Low fly Aircraft	A-37 Maximum height	A-46 Maximum weight	A-47 Maximum weight per axle
A-44 High winds	A-16 Tram

Regulatory signs

R-1 Stop	R-2 Yield	R-3 No Entry	R-4a No Left Turn	R-4b No Right Turn	R-6a No Parking
R-6b Parking	R-6c No Stopping	R-7 No Overtaking	R-12 No Bicycles	R-19 Speed Limit	R-24a One-way Street
R-24b Pass on the Right	R-26 Proceed straight	R-25a Turn left	R-25b Turn Right	R-25c Proceed left or straight
R-25d Proceed right or straight	R-28 Two-way traffic	R-9 No trucks	R-5a No U-turn	R-29 No pedestrians	R-15 Height limit
R-33 Roundabout	R-34 Bicycles only	R-8a No lane changes to right	R-8b No lane changes to left	R-10 No cars	R-39 Trucks only
R-23 Cars keep right	R-32 Buses only

Educational signs

Wear your seatbelt

Obey posted signs

Don't throw trash on the highway nature thanks you

Help take care of our natural riches drive carefully

Preserve nature think of future generations

Directional signs

Highway indicative sign