What is the name of the international road-sign treaty adopted in Vienna in 1968?
Answer
Vienna Convention on Road Signs and Signals
The international road-sign treaty adopted in Vienna in 1968 is the Vienna Convention on Road Signs and Signals.
The treaty aims to standardize road signs, traffic signals, and road markings so that international drivers can interpret essential warnings and instructions more easily. It addresses sign categories, colors, shapes, symbols, and principles for placing signs.
The convention was developed under the United Nations Economic Commission for Europe. It entered into force in 1978, after enough participating countries completed the required ratification process.
It does not make every road sign worldwide identical. Contracting countries can retain national details and add signs for local conditions, provided their systems remain compatible with the convention’s framework.