These dual carriageways are managed by the state-owned National Motorway Company of Slovakia - NDS, established in 2005. The first modern highway in Slovakia was the motorway towards Prague whose construction was started on May 2, 1939.
NDS is currently managing and maintaining 432 km of motorways (diaľnica) and 288 km of expressways (rýchlostné cesty).
The motorways in Slovakia, Slovak: Diaľnica (abbr. D), are defined as two-lane motorways in each direction, with emergency lane. The speed limit is 130 km/h or 80 mph. Their road signs are white on red.
The expressways in Slovakia, Slovak: rýchlostné cesty (abbr. R), are defined as dual carriageways with lower standards than that of a motorway, but with the same restrictions. The speed limit is 130 km/h or 80 mph. Their road signs are white on red.