Yield Sign (Give Way)
Triangular traffic sign requiring drivers to yield right-of-way.
International · 1950 – present
Stop Sign
Octagonal red traffic sign requiring vehicles to come to a complete stop.
Description
The stop sign is a regulatory traffic sign requiring drivers to bring their vehicle to a complete stop before proceeding. The distinctive octagonal shape and red color were standardized to make the sign recognizable even when partially obscured or when the text is not legible. The eight-sided shape was chosen because it is unique among traffic signs, ensuring immediate recognition. The Vienna Convention on Road Signs and Signals (1968) established the red octagon with white border and 'STOP' text as the international standard.
Origin & Cultural Context
The first stop signs appeared in the United States in 1915. The octagonal shape was standardized in the US in 1923 and internationally by the Vienna Convention in 1968.