Where are the biggest traffic jams on highways currently?

The biggest jams are on the A1 in the Brezik tunnel (single-lane traffic) and on the A3 near the Lučko and Zagreb zapad interchanges, where the queue is about 5 kilometers long.

Until when do the works on the A3 highway last?

The drainage rehabilitation between the Popovača and Kutina interchanges lasts until September 1, 2026, and the works between the Sveta Nedelja and Zagreb zapad interchanges until October 3, 2026.

What conditions are expected on Tuesday, August 12?

HAK expects increased traffic towards the coast, delays on the Zagreb and Rijeka bypasses, possible restrictions due to the bura wind on the Adriatic Highway, and longer waits at border crossings.

What does HAK advise drivers in case of congestion?

HAK advises maintaining a safe distance between vehicles and forming an emergency corridor for the passage of intervention vehicles.

Croatia

Accident in the Brezik Tunnel and Works on the A3 Cause Traffic Jams

A.E. · Prije 17h | 3 min

The Croatian Automobile Club reports slow traffic on the A1, A3, and the Istrian Y, with additional delays expected on August 12 on routes to the coast and city bypasses.

Summary

A traffic accident in the Brezik tunnel on the A1 causes single-lane traffic in the direction of Zagreb.
On the A3 near the Lučko and Zagreb zapad interchanges, a queue of about 5 kilometers has formed due to a collision.
Long-term works on the A3 between Sveta Nedelja and Zagreb zapad last until October 3, 2026.
Additional delays are expected on Tuesday due to increased traffic towards the coast and possible restrictions due to the bura wind.

Make 5MIN.hr a preferred source

Drivers on Croatian highways are facing serious traffic difficulties on Monday. Due to a traffic accident in the Brezik tunnel on the A1 and a collision on the A3, kilometer-long queues have formed, and the situation is further complicated by numerous works on key roads. The Croatian Automobile Club (HAK) warns that problems will continue on Tuesday, when increased traffic towards the coast is expected.

Single Lane in the Brezik Tunnel and a 5-Kilometer Queue on the A3

According to HAK's report from August 11, 2026, a traffic accident occurred in the Brezik tunnel on the A1 Zagreb-Ploče-Karamatići highway in the direction of Zagreb. Traffic in this section is moving in one lane with a speed limit, causing increased traffic density between Zagreb and Zadar in both directions.

At the same time, another traffic accident occurred on the A3 Bregana-Lipovac highway, near the Lučko and Zagreb zapad interchanges. At kilometer 16+100 in the direction of Bregana, traffic is moving in one lane, and the queue of vehicles stretches for about 5 kilometers.

Slow Traffic on the Istrian Y and the A2

There are also problems on the Istrian Y (A8/A9), where traffic is slow between the tunnel and the Učka interchange and the Matulji interchange in both directions. On the A2 Zagreb-Macelj highway, traffic is moving only in the driving lane on two sections: from kilometer 17+500 to 13+750 in the direction of Macelj (between Krapina and Đurmanec) and from kilometer 6+700 to 8+200 in the direction of Zagreb (from Trakošćan to Đurmanec).

Works That Will Last for Weeks

In addition to unexpected events, drivers are also slowed down by long-term works on the A3. Until September 1, 2026, drainage rehabilitation is underway on the section between the Popovača and Kutina interchanges in the direction of Lipovac (from kilometer 90+700 to 93+800), where traffic is moving in two narrowed lanes. An even bigger challenge is the section between the Sveta Nedelja and Zagreb zapad interchanges (from kilometer 12+480 to 15+300), where works will last until October 3, 2026. Due to the closed carriageway in the direction of Lipovac, traffic is redirected to the carriageway in the direction of Bregana and is moving in two directions in two narrowed lanes.

What to Expect on Tuesday

HAK announces additional complications for Tuesday, August 12, 2026. Due to the bura wind on the Adriatic, restrictions are possible for certain vehicle groups, especially on the Adriatic Highway in the area under Velebit. During the morning and afternoon, delays and queues are expected on the Zagreb bypass (A3), the Rijeka bypass (A7), and on the A2 at the Zagreb zapad interchange. Increased traffic towards the coast brings occasional delays in tunnel zones, rest areas, and toll booths, and longer waits at border crossings are also possible.

HAK reminds drivers to maintain a safe distance and, in case of congestion, form an emergency corridor for the passage of intervention vehicles.