Road signs in the Soviet Union

Road signs in the Soviet Union were regulated in the GOST 10807-78 standard which was introduced on 1 January 1980. This standard also specified the typeface used on road signs. After the dissolution of the Soviet Union in 1991, this standard continued to apply in all countries that were formerly Soviet republics until some of them adopted their own national standards for road signs. The shapes and colors of road signs in the Soviet Union, and now in all post-Soviet states, fully comply with the 1968 Vienna Convention on Road Signs and Signals, to which the Soviet Union was originally a signatory. On 8 November 1968, the Soviet Union signed the Vienna Convention on Road Signs and Signals, and on 7 June 1974 ratified it with some declarations and reservations made upon ratification.
Road signs in the Soviet Union were divided into 7 categories:

Warning signs
Priority signs
Prohibitory signs
Mandatory signs
Information signs
Service signs
Additional signs

Below are images of road signs used in the Soviet Union before its dissolution in 1991. The galleries shown below do not show road signs that were included in the GOST 10807-78 standard after 1991. The vast majority of road signs shown below are still used in post-Soviet states such as Russia, Armenia, Azerbaijan, Belarus, Georgia, Kazakhstan, Kyrgyzstan, Lithuania, Tajikistan, Turkmenistan, Ukraine, and Uzbekistan but with some modifications in design.

Road signs of 1933

Post-Soviet states

The GOST 10807-78 standard is still valid in Azerbaijan and Turkmenistan, but has been replaced by new standards in other states, i.e., national standards for road signs in each of the post-Soviet states:

In Russia, it was replaced by the GOST R 52290-2004 standard on January 1, 2006. The same standard applies to road signs used in Kyrgyzstan since October 2019 and Armenia ;
In Ukraine, it was replaced by the DSTU 2586-94 standard in 1994, later DSTU 4100-2002 on January 1, 2003, DSTU 4100-2014 on July 1, 2015, DSTU 4100:2021 on November 1, 2021;
In Belarus, it was replaced by the STB 1140-99 on October 1, 2001, later STB 1140-2013 on July 1, 2014;
In Kazakhstan, it was replaced by the ST RK 1125-2002 standard on January 1, 2004, later ST RK 1125-2021 on July 1, 2022;
In Uzbekistan, it was replaced by the O'zDST 3283:2017 standard on December 15, 2017.