[2] This corridor was initially included in the expressway network and thus also in the construction plans as early as 1963, by the resolution of the Government of the Czechoslovak Socialist Republic No.

The Svidník bypass (Ladomirová – Svidník-juh) at a length of 4.6 kilometres (2.9 mi), in a half profile was put into operation at the end of 2010.

[6] In July 2019, Vahostav-SK was tendered to begin construction on Stage I of the Prešov northern bypass.

The section will include twelve bridge structures of various lengths and the approximately 1.9 kilometres (1.2 mi) long Okruhliak tunnel.

Road continues as the Polish S19 Content in this edit is translated from the existing Slovak Wikipedia article at sk:Rýchlostná cesta R4 (Slovensko); see its history for attribution.