The completion of all priority railway projects in Bulgaria is estimated to cost 4.32 billion euro ($5.1 billion), transport minister Ivaylo Moskovski has said. About 4.15 billion euro will be used for projects related to the Trans-European Transport Network (TEN-T), Moskovski said in a statement on Thursday. The remainder of 173 million euro will be used to finance an upgrade of the 123 km-long railway section Karnobat-Sindel, the minister said, adding that the section is very significant because it is connecting Bulgaria's largest Black Sea ports of Varna and Burgas. Some of the projects will connect Bulgaria's railway network to the networks of its neighbours and those investments will boost growth and security of the whole region, Moskovski said. The modernisation of railway section Vidin-Sofia, part of Europe's Orient/East-Med Corridor has an indicative value of 2.3 billion euro. The upgrade of the section is planned for 2022-2027.