Road Sign A1 – Dangerous Curve to the Right

Category: Warning road signs
Code: A1
Name: Dangerous curve to the right

Description:
Road sign A1 is used to warn drivers of an upcoming dangerous right-hand curve, requiring increased caution and potentially reduced speed. This sign is placed before road sections where the curve poses an elevated risk of traffic accidents, especially under poor weather conditions, reduced visibility, or slippery surfaces.

Visual characteristics:

• Shape: Equilateral triangle with apex upward

• Border: Red

• Background: White

• Symbol: Black curve turning right, depicting the shape of the curve

Placement and use:
Sign A1 is placed before the curve at a sufficient distance to give the driver time to respond properly — by reducing speed and adjusting to the road conditions. The placement distance depends on the permitted speed and the specific road situation.

Purpose of the sign:

• To inform drivers of an approaching risky section

• To improve safety through early warning

• To reduce the number of traffic accidents in curves

Related warning signs:

• A2: Dangerous curve to the left

• A3: Sequence of dangerous curves (first to the right)

• A4: Sequence of dangerous curves (first to the left)