Vertical Traffic Signs: Full Reference
Vertical traffic signs regulate traffic locally or temporarily. They are binding for all road users.
Groups of vertical traffic signs:
- Warning (A) – yellow triangle with red border; warn of danger
- Prohibition (B) – red circle; prohibit a certain action
- Mandatory (C) – blue circle; mandate manner of driving
- Priority (P) – various shapes; determine priority at intersections
- Informative traffic (IP) – blue or white rectangle; inform about traffic
- Informative zone (IZ) – mark start/end of a zone with a specific regime
- Supplementary plates (E) – supplement and specify the basic sign below them
Explanation
Warning signs (A)
Warn of danger that cannot be removed. The driver must adapt their driving.




A1–A2 Bends
- A1a – Bend to the right
- A1b – Bend to the left
- A2a – Double bend, first to the right
- A2b – Double bend, first to the left




A5–A6 Narrowing and unevenness
- A5a – Steep hill downwards
- A5b – Steep hill upwards
- A6a – Road narrows on both sides
- A6b – Road narrows on one side


A7 Descent and incline
- A7a – Uneven road
- A7b – Speed bump
Warning sign validity: from the point of placement to the nearest intersection. If plate E3a with a number (e.g. 200 m) stands below it, it applies for that distance.
Prohibition signs (B)
Prohibit a certain action. Valid from the point of placement.




B1–B2–B4–B11 No entry
- B1 – No entry for all vehicles in both directions
- B2 – No entry for all vehicles (one-way – wrong direction)
- B4 – No entry for goods vehicles
- B11 – No entry for all motorised vehicles




B20–B21 Speed and overtaking
- B20a – Maximum speed limit (number in km/h)
- B20b – End of maximum speed limit
- B21a – No overtaking
- B21b – End of no overtaking



B28–B29–B26 Stopping and end of prohibitions
- B28 – No stopping (even brief stopping prohibited)
- B29 – No parking (stopping up to 3 min allowed, but you must not leave the vehicle)
- B26 – End of all prohibitions: cancels all prohibition signs since the last intersection
Difference B28 vs. B29: B28 prohibits even a brief stop. B29 allows brief stopping (max. 3 min) without leaving the vehicle.
Mandatory signs (C)
Blue circle, white symbol. Mandate manner of driving or movement.




C2 Mandatory direction
- C2a – Mandatory direction ahead
- C2b – Mandatory direction right
- C2c – Mandatory direction left
- C2d – Mandatory direction ahead or right




C4–C7–C8 Passing and paths
- C4a – Keep right (pass obstacle on the right)
- C4b – Keep left
- C7a – Footpath
- C8a – Cycle path
Informative zone signs (IZ)




IZ1–IZ2 Motorway and expressway
- IZ1a – Motorway (max. 130 km/h; non-motorised vehicles prohibited)
- IZ1b – End of motorway
- IZ2a – Dual carriageway
- IZ2b – End of dual carriageway





IZ5–IZ10 Special zones
- IZ5a – Residential zone (max. 20 km/h; pedestrians may use the whole area; children may play)
- IZ7a – Low emission zone
- IZ8a – Zone with traffic restriction
- IZ9a – Cycle zone
- IZ10a – Shared zone
Summary
Key points to remember:
- A (warning) – yellow triangle; valid to the nearest intersection or the distance per E3a
- B (prohibition) – red circle; B26 cancels all prohibition signs since the last intersection
- C (mandatory) – blue circle; mandate a specific manner of driving
- B28 = no stopping; B29 = no parking (brief stop up to 3 min OK, leaving vehicle not)
- IZ1a Motorway = 130 km/h; IZ2a Expressway = 110 km/h
- IZ5a Residential zone = max. 20 km/h; pedestrians always have priority
What the law says
(1) Svislé dopravní značky jsou
a) výstražné značky, které upozorňují na místa, kde účastníku provozu na pozemních komunikacích hrozí nebezpečí a kde musí dbát zvýšené opatrnosti,
b) značky upravující přednost, které stanoví přednost v jízdě v provozu na pozemních komunikacích,
c) zákazové značky, které ukládají účastníku provozu na pozemních komunikacích zákazy nebo omezení,
d) příkazové značky, které ukládají účastníku provozu na pozemních komunikacích příkazy,
e) informativní značky, které poskytují účastníku provozu na pozemních komunikacích nutné informace, slouží k jeho orientaci nebo mu ukládají povinnosti stanovené tímto zákonem nebo zvláštním právním předpisem,23)
f) dodatkové tabulky, které zpřesňují, doplňují nebo omezují význam dopravní značky, pod kterou jsou umístěny.
(2) Svislé dopravní značky jsou stálé, proměnné a přenosné. Proměnná svislá dopravní značka je dopravní značka, jejíž činná plocha se může měnit. Přenosnou svislou dopravní značkou se rozumí dopravní značka umístěná na červenobíle pruhovaném sloupku (stojánku) nebo na vozidle.
Verbatim text of Act No. 361/2000 Coll., on road traffic, as in force on 1 January 2026. Quoted in Czech — the Czech wording is the binding one.
Check what you remember
Five questions from the official bank. The answer appears only after you choose — try to recall it first, that is what makes learning stick.
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Question 1 of 5
This traffic sign:

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Question 2 of 5
This traffic sign:

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Question 3 of 5
This traffic sign:

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Question 4 of 5
This warning traffic sign warns of:

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Question 5 of 5
This warning traffic sign:
