The Royal Commission for Riyadh City has awarded Alstom a €460m contract to supply additional Metropolis driverless metro trainsets for lines 3 (Orange), 4 (Yellow) and 6 (Purple) of the Saudi capital's six-line metro network.

Alstom disclosed the award on September 28. The contract covers an undisclosed number of trainsets that will join the 116 Metropolis units already in service on the three corridors.

What will the additional trainsets deliver?

Alstom said the expansion would:

• Lift passenger capacity on lines 3, 4 and 6
• Improve operational flexibility for the network operator
• Enable higher service frequency as demand grows

The company has not disclosed the additional train count, the per-unit price beyond the headline contract value, or the delivery timeline. The 116 sets already running on the three lines were part of Alstom's original contribution to the Riyadh metro, with other suppliers covering the remaining three lines.

How will the operator deploy the new units?

The extra Metropolis trains will run alongside the existing fleet on the three corridors. Alstom expects the operator to deploy the additional sets to shorten headways, ease peak-hour crowding and absorb forecast demand growth across the Saudi capital.

Who will maintain the new vehicles?

Alstom will service the additional trainsets under the existing operation and maintenance contract that already covers lines 3, 4 and 6. Extending the same O&M scope to the new units keeps maintenance with the original supplier and avoids fragmenting the technical support base across multiple vendors.

What did Alstom say about the order?

Mohamed Khalil, Alstom's MENA RHQ Managing Director, announced the contract on September 28.

"We are proud to continue supporting the Royal Commission for Riyadh City in expanding one of the world's most advanced metro networks," Khalil said. "The additional vehicles will help the network respond to growing demand while continuing to provide a high-quality passenger experience."

Why are lines 3, 4 and 6 being expanded first?

The three corridors already operate with Alstom Metropolis driverless stock. Adding more trains to a proven platform shortens integration time and limits the risk that typically accompanies a new fleet introduction.

The Royal Commission has not announced further fleet orders for lines 1, 2 or 5, which run on rolling stock from other suppliers. Capacity figures, headway targets and a confirmed delivery timetable will follow once Alstom discloses the number of trainsets covered by the €460m envelope.

What is the wider context?

The Riyadh metro comprises six lines serving the Saudi capital. Lines 3, 4 and 6 represent the portion of the network for which Alstom supplied the original rolling stock and continues to provide maintenance. The additional order extends that relationship without introducing a competing vehicle platform.

The €460m headline value sets a per-trainset benchmark that fleet planners at peer operators will track. Any unit cost implied by the contract may shape subsequent negotiations for similar Metropolis orders elsewhere in the Gulf region.

What comes next?

Alstom and the Royal Commission have yet to publish a delivery schedule for the new trainsets. The order also lacks a confirmed in-service date.

Riyadh's six-line metro continues to scale capacity as ridership builds. The €460m Alstom contract marks the second fleet addition for lines 3, 4 and 6, signalling further operator confidence in driverless metro capacity as the Saudi capital's public transport network matures.