BDZ expands deployment of Alstom Coradia Stream EMUs on Sofia–Burgas route, Bulgaria October 30, 2026 | Europe News, News BDZ has deployed two additional Alstom Coradia Stream electric multiple units (EMUs) on express services between Sofia and Burgas, increasing the number of units from four to six. The trains are being... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password