Preliminary design is nearing completion on the Riyals 32bn network and tenders for the design and build contract for the first phase are due to be launched later this year.

The network will comprise three lines, all of which are scheduled for completion by 2020. The 67km north-south Orange line will link Makkah Road with Obhur with a branch running east along Sari Street. The 24km Blue Line will have 17 stations and will connect King Abdulaziz International Airport with the Haramain high-speed station, while the 17km Green Line will follow the alignment of Old Palestine Road from the Corniche to the Haramain station.