Changes

Going from Osijek to Bosnia toward Banja Luka. You could try to go on high way(E73) that leads back from Osijek to Zagreb just before pay tolls, try to catch a ride to Nova Gradiska and than you are not so far away from Bosnia(driver will probably leave you just before border). On this high way in from Osijek to Đakovo it is not so good traffic and cars are going very rarely so maybe it is better to take normal road to Bosnia but you could try your luck(later when pass Đakovo and you drive at A3 high way there is much better traffic). People probably do not use often this high way because you must pay fee for driving there and normal road is free.