The Saudi Railways Organization (SRO) was a state-owned railway company that operated part of Saudi Arabia's rail network, along with the Saudi Railway Company (now Saudi Arabia Railways). The SRO operated a network of railways with a total length of approximately 1,380 kilometers. The network consisted of two main lines. A 449 km passenger line that links Dammam with Riyadh, and a 556 km freight line that connects the King Abdul Aziz Port in Dammam with Riyadh. There are plans to extend the network to the Red Sea port of Jeddah and, eventually to the borders of Jordan, Yemen, and perhaps all the way to Egypt. Approval to merge the Saudi Railways Organization and Saudi Railway Company was announced in February 2021, the merger took place on 1 April 2021 and the merged entity is known as the Saudi Arabia Railways.

Rolling stock

Spanish manufacturer CAF delivered eight fast diesel locomotives in 2012, with one driving van trailer passenger car and four other passenger cars, with a leading power car unit; plus two spare power cars. They are used on the Dammam–Riyadh Line. During 2013 the travel time is 4:15 but there is a target of 3:00 for the future.

Trainsets

Diesel Locomotives

Expansion

The SRO has several plans to expand the network as part of the Saudi Railway Master Plan 2010-2040 (SRMP). Some of the projects under the plan are: