[leopoldj]

From Sofia to the West of Turkey should be relatively easy. After that, travel through Iran, Afghanistan and Pakistan will get hairy.

[ZeroConcerns]

You'd be surprised at how cheap, relatively safe and reliable bus services are in those regions.

Source: me and my wife traveled extensively by public transport in, well, at least Pakistan. The other countries are indeed sort-of hairy, but mostly for job-clearance-related reasons.

[abdullahkhalids]

10s of thousands of religious pilgrims travel by bus between Pakistan and Iran every year. You can just avoid Afghanistan.

[mminer237]

Generally the border between Paxistan and India cannot be crossed though. I believe Attari/Wagah is the only place, and it was closed too last I heard.

[staplar]

They should avoid Pakistan if they can, not Afghanistan. It’s in relative peace while the border region of Iran/Pakistan see regular fighting between Pakistani forces and Baluch separatists[1].

1. https://en.wikipedia.org/wiki/Balochistan_Liberation_Army

[nephihaha]

There were some bad roads in the Balkans as well.