D420 is a state road in the northern outskirts of the city of Dubrovnik, Croatia, connecting the Port of Gruž to the D8 state road. The road is long.

The road, as well as all other state roads in Croatia, is managed and maintained by Hrvatske Ceste, state owned company.

Road junctions and populated areas

NOTE: Junctions, populated areas and toll plazas are listed here.--> D420 junctions/populated areas Type Slip roads/Notes Dubrovnik D8 to Slano (to the west) and to Dubrovnik and Brgat border crossing to Trebinje, Bosnia and Herzegovina via D223 state road.Ž6254 to Komolac, Mokošica and Lozica (D8).The northern terminus of the road. Port of GružThe southern terminus of the road.

Sources