 The traffic volume decrease is somewhat more pronounced at interchanges serving Slavonski Brod and the A5 motorway (Sredanci).The seasonal traffic volume variation ranges from a 28% increase on the busiest, Ivanja Reka–Rugvica, section to a 75% volume increase, as measured on the Županja–Spačva section.Average summer season traffic volume increase on the motorway is 55%.