The Saudi Landbridge Railway Project consists of a circa 1300 km railway line linking Jeddah with the existing Riyadh and Dammam railway networks. It is intended to be a mixed freight and passenger non-electrified railway line. Design speed is 350km/h for passenger trains and 160km/h for freight trains. During the Detailed Phase, Coding performed the engineering services for preparation of the design from km 558 to km 1051: the design includs the alignment, 102 viaducts, 5 cut and covers, 24 overpasses, 40 interfering roads and a huge area for railway facilities.