It consists of 2 sections arranged in a shape similar to the alphabetical letter 'Y', located in the Istria County: The A8 is a 64.21 km (39.90 mi) long branch which starts at Matulji in Primorje-Gorski Kotar County and finishes in Kanfanar interchange, at the crossing with the A9.

The A9 is a 76.79 km (47.72 mi) long branch which connects the Croatian-Slovenian border near Sečovlje with the city of Pula and services the tourist industry on the western coast of Istria.

There are two prominent object on this branch of Istrian Y: the viaduct "Limska draga" and the bridge "Mirna".

The viaduct "Limska draga" was built between 1988 and 1991 and was the first part of the western branch of Istrian Y that was constructed.

Traffic flowing Kvarner-bound through the Istria-bound (new) tube during this time is tolled at a temporary structure on the Istrian side.

Phase 2B2-2 is estimated to cost around EUR 200 million,[7] and when complete, will mean the journey time between Pula and Zagreb is approximately 2 and a half hours.