What the road is like
The first stretch is motorway towards Zenica: fast and without surprises. After that you join the main road through Travnik, Jajce and Mrkonjić Grad, and the pace drops noticeably.
The main-road section crosses mountain passes and has a lot of bends. It is not a hard road, but it asks for attention and does not forgive hurry, particularly in the rain.
Winter conditions
The passes between Jajce and Mrkonjić Grad hold snow in winter even when the valleys are clear. From November to April the cars carry winter equipment, which here is a practical need as much as a legal requirement.
If you are travelling in winter, set off earlier and allow more than the map says.
Tolls and fuel
Tolls apply only on the motorway section at the start of the route. The rest is untolled main road.
Filling stations are sparser on the main-road section than on the motorway, so top up before you leave the motorway rather than after Jajce.