Twelve bids have been filed in a tender for the supervision of the construction of a 64 kilometre section of the Struma motorway between the towns of Blagoevgrad and Sandanski, the Road Infrastructure Agency said.
Companies from Bulgaria, Italy, the Czech Republic, Sweden and Poland are among the bidders, the agency said in a statement.
The project has an indicative cost of 2.5 million levs ($1.7 million/1.3 million euro).
The Struma motorway, which links Sofia with the Greek border, has a total length of 173.28 km and it is part of pan-European transport Corridor IV.