DN4 () is a national road in Romania which links Bucharest with OlteniÃÂa, on the banks of Danube. The road is running north - south and is following the ArgeÃÂ River.
Outside of Bucharest, the only main intersections between DN4 and other national roads are in OlteniÃÂa. The DN41 starts from the municipality, ending in a roundabout with the DN5 near PlopÃÂoru, 10 km north of Giurgiu. Another road, in the same area, links the same city to the DN3 at CÃÂlÃÂraÃÂi and further to the A2 motorway towards ConstanÃÂa. This national road is known as DN31.
The national road was formerly linked to the Bulgarian border through a ferry, towards Tutrakan, however the ferry was discontinued and as such the road now ends near the Port of OlteniÃÂa, one of the largest river ports in Romania.