The RB12 is major

highway A highway is any public or private road or other public way on land. It includes not just major roads, but also other public roads and rights of way. In the United States, it is also used as an equivalent term to controlled-access highway, or ...

of western

Tajikistan Tajikistan, officially the Republic of Tajikistan, is a landlocked country in Central Asia. Dushanbe is the capital city, capital and most populous city. Tajikistan borders Afghanistan to the Afghanistan–Tajikistan border, south, Uzbekistan to ...

. Travelling in an east–west direction it connects the north–south M34 north of

Ayni Ayni ( Quechua and Aymara; also spelled ''Ayniy'' or ''Aini'') can refer to either the concept of reciprocity or mutualism among people of the Andean mountain communities or the practice of this concept. As a noun, the law of ayni states that ...

with the Uzbek border west of

Panjakent Panjakent () or Penjikent () is a city in the Sughd province of Tajikistan on the river Zeravshan (river), Zeravshan, with a population of 52,500 (2020 estimate). It was once an ancient town in Sogdiana. The ruins of the old town are on the outsk ...

. It is long.State program for the development of the transport complex of the Republic of Tajikistan until 2025
Tajikistan Ministry of Transport, p. 18 (in Tajik). In the former

Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...

, the road was part of the longer A377 which continued to

Samarkand Samarkand ( ; Uzbek language, Uzbek and Tajik language, Tajik: Самарқанд / Samarqand, ) is a city in southeastern Uzbekistan and among the List of oldest continuously inhabited cities, oldest continuously inhabited cities in Central As ...

References

Roads in Tajikistan {{Asia-road-stub