A truck passes a segment of old railway at a construction site on section two of Kenya's Standard Gauge Railway project, near Voi, Kenya, on March 19, 2015. The project, expected to cost 3.8 billion U.S. dollars, involves the construction of about 480 kilometer railway line from the port city Mombasa to the capital city Nairobi. China Roads and Bridges Corporation (CRBC) is undertaking the project. (Xinhua/Pan Siwei)