D403 is a state road connecting A7 motorway Škurinje interchange[1] to the centre of the city of Rijeka, and to the Port of Rijeka West terminal.

[2] The road is 2.5 km (1.6 mi) long.

[3] The D403 state road is scheduled for a reconstruction in order to provide a more efficient connection to the Port of Rijeka, but those plans have been postponed.

[4] Currently, D-403 comprises many urban at-grade intersections within the city of Rijeka.

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