Over 30 Bulgarian and foreign companies have expressed their interest in building a road tunnel under the Shipka Pass in Central Bulgaria. The news was announced by the National Agency Road Infrastructure which has received letters of interest by the potential investors, which were supposed to be submitted before the deadline on July 15.

The letters of interest include general presentations of the companies and description of their experience and equipment. They are not binding in any way, and serve purely marketing research purposes.

Based on the expressed interest, in September or October 2009, the road agency is going to hold an information meeting as a first step towards a public procurement tender