 The A3 section of Zagreb bypass is currently the busiest section of the Croatian motorway network, with annual average daily traffic (AADT) volume exceeding 40,000 vehicles, leading to congestion of the six-lane bypass at peak hours, especially during the summer, when tourist traffic adds to the congestion.The mainline toll plazas at Bobovica and Ivanja Reka can both become bottlenecks at such times.The alternative to the bypass is going through the city via Ljubljanska, Zagrebačka and Slavonska avenues.