I read in Bosnian site ekapija Bosnian road company JP Autoceste FBiH organized road show for Ovčari – Tunnel Prenj – Mostar North and Mostar North – Mostar South roads.

For tunnel JP Autoceste FBiH has funding. 97.2 million euro from a loan from European Bank for Reconstruction and Development (EBRD) and also funds from the European Investment Bank (EIB).  JP Autoceste FBiH will also find remaining 249.6m euro from WBIF grants and their own money.

A total of 17 companies showed interest in the tunnel project. There are also related road construction work worth 540 million euro.

https://www.ekapija.com/news/2922327/za-gradnju-tunela-prenj-u-bih-zainteresovano-17-preduzeca