R1 is an expressway (Slovak: rýchlostná cesta) in Slovakia, which begins near Trnava and ends in Ružomberok.

The R1 passes Sereď, Nitra, Zlaté Moravce, Hronský Beňadik, Nová Baňa, Žarnovica, Žiar nad Hronom, Zvolen and Banská Bystrica.

Both sections, Nitra - Hronský Beňadik and bypass of Banská Bystrica, were built, and are operated as a public-private partnership project.

The section Sereď - Pata was built only in a half profile so in the mid-1990, the upgrade to a four-lane road began.

The entire 13.1 kilometres (8.1 mi) long section from Trnava to Sereď was completely opened on 15 July 2000.

A 46 kilometres (29 mi) long section Nitra - Tekovské Nemce was financed by a PPP project.

EUR 130 million was paid by the Slovak state to Granvia for the maintenance of the road in addition to the construction itself.

The first section; 12.59 kilometres (7.82 mi) long between Nitra–západ – Selenec, for which the planned cost from 2007 was EUR 196 million (5 billion CZK) with financing from the Structural Fund, the state budget and the resources of the National Motorway Company.

Completed at the same time was the 18.97 kilometres (11.79 mi) long section connecting Nitra and Beladice, and the 14.3 kilometres (8.9 mi) long section between Beladice – Tekovské Nemce which connects to the R1 at Zlaté Moravce.

A 3 kilometres (1.9 mi) long section in Banská Bystrica is under construction, and is planned to open in 2026.