D4 motorway (Czech Republic)

D4 Motorway
Dálnice D4
Via Salis
Route information
Length	75.7 km (47.0 mi) Planned: 84.7 km (52.6 mi) including 9 km (5.6 mi) near Prague
Major junctions
From	D0 in Prague
To	Nová Hospoda, interchange with I/20
Location
Country	Czech Republic
Regions	Prague, Central Bohemian, South Bohemian
Major cities	Prague, Dobříš, Příbram, Písek
Highway system
Highways in the Czech Republic
← D 3 → D 5

D4 motorway (Czech: Dálnice D4), until 31 December 2015 formerly Expressway R4 (Czech: Rychlostní silnice R4) is a motorway running from Prague in the Czech Republic, in a southwesterly direction. Some of the sections are managed through the PPP project called Via Salis (Salt Road).^[1] A total of 75.7 kilometres (47.0 mi) is in operation.

The route roughly follows the route of the historic Golden Trail and the I/4 road, which connects Prague and the western half of the South Bohemian Region. The highway starts at the exit from the I/4 Jíloviště road, because the section between Prague and Jíloviště, although it is four-lane, lacks an accompanying road, and therefore this section cannot be classified as a highway and tolled.

A vignette is therefore required only further south of Jíloviště, and along the entire route of the highway. On the second newest section between Mirotici and Třebkovo, the D4 highway is still free of tolls. The freeway ends at an interchange with I/20, from where the road continues to České Budějovice.