20
Ara
Survey, feasibility, preliminary and detailed design, and engineering services of 654.74 km double-track highspeed railway line with 250 km/h operation speed. Minimum curvature radius is 3,500 m, and maximum vertical slope is 1.6 %. The project includes 10 stations, 840 culverts, 368 underpasses, 73 overpasses, 188 bridges and viaducts with
