Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the road serves as A1 motorway connector, carrying substantial tourist traffic especially to Plitvice Lakes National Park.

Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the road connects two arms of Istrian Y carrying substantial tourist traffic.

Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the road carries substantial tourist traffic.

Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the road serves as a connection carrying substantial tourist traffic to Split area islands, while the D8 and D1 state roads provide quick access to A1 motorway Dugopolje interchange.

Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the road serves as a connection to A1 motorway carrying substantial tourist traffic.

It attracts substantial tourist traffic during the trekking season between April-October.

Variations between AADT and average summer daily traffic (ASDT) traffic volumes are attributed to the fact that the motorway carries substantial tourist traffic to the Adriatic Sea resorts.

Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the road connects Plovanija border crossing to Slovenia and A9 motorway carrying substantial tourist traffic to Istria, a major touristic destination.

The differences between the AADT and ASDT traffic volumes in 2010 are attributed to the motorway's carriage of substantial tourist traffic to the Adriatic Sea resorts along the Istrian peninsula.