Kvarner Gulf
Substantial variations observed between AADT and ASDT are normally attributed to the fact that the motorway carries significant tourist traffic to Istria and Kvarner Gulf area. The seasonal increase in traffic volume ranges from 10% on the south of Oštrovica interchange to 120% as measured on the Rupa–Matulji section. The central part of the motorway exhibits summer-season traffic volume increase of approximately 50%.