Despite an apparent uniformity and standardisation, European traffic signs present relevant differences between countries. However most European countries refer to the 1968 Vienna Convention on Road Signs and Signals — adopted in Europe by Albania, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Luxembourg, Macedonia, Montenegro, the Netherlands, Norway, Poland, Portugal, Romania, Russia, San Marino, Serbia, Slovakia, Slovenia, Sweden, Switzerland, Turkey and Ukraine. The...