The Royal Commission for Riyadh City has announced the roll-out of two additional lines, Red: King Abdullah Road and Green: King Abdulaziz Road of the Riyadh Metro. 

The Red Line is 25.1 km long and runs east to west along King Abdullah Road, connecting King Fahd Sports City to King Saud University across 15 stations, including the Riyadh International Convention and Exhibition Center. It intersects with the Blue Line at the STC Station, with the Green Line at the Ministry of Education Station, and with the Purple Line at Al-Hamra Station.

The Green Line, along King Abdulaziz Road, is 13.3 km long and runs from King Abdullah Road, past the Ministry of Education, all the way to the National Museum. Its 12 stations serve several government entities, including the Ministry of Defense, the Ministry of Finance, and the Ministry of Commerce, as well as numerous commercial, service, and residential facilities. The Green Line intersects with the Red Line at the Ministry of Education Station and with the Blue Line at the National Museum Station.

The Orange Line, spanning Madinah Road, will launch on January 5, 2025, completing the network. Phase one of the metro started on December 1, 2024, with three operational lines: Blue, Yellow, and Purple. Riyadh Metro's six lines, spanning 176 km with 85 stations, will achieve full functionality once the Orange Line becomes operational, making five lines active.