We are planning to drive from Split to Dubrovnik. I noticed that the highway goes through Bosnia. Is this a problem? Do you have to go through border crossings?
I made this crossing via Neum in a bus in early Sept - I'm pretty sure we had to show our passports, I don't remember anything onerous because there was no major traffic on the road...the article link should answer your Q http://dobbs.foreignpolicy.com/posts/2011/10/19/crossing_the_worlds_most_ridiculous_border