📋 Tender Overview
Extended service contract to ensure continued performance and resilience of the Downtown Lines signaling system
Proactive obsolescence management, technology refresh and upgrades to maintain long-term system operability and reliability
Siemens Mobility and SBS Transit have announced the extension of the ongoing Long-Term Service Support (LTSS) contract for the signaling system of Singapores Downtown Line (DTL), one of the worlds most reliable metro systems and a key element of the city-states high-capacity public transport network. The outcome-based agreement runs for 22 years, from January 1, 2026, until December 31, 2047, and covers obsolescence treatment, technology refresh and upgrades, including security-related measures. The fully automated metro line spans around 44 kilometers with 37 stations.
We are very pleased to expand our partnership with SBS Transit, said Elmar Zeiler, CEO of Siemens Mobility Customer Services. By combining lifecycle services with proactive obsolescence management, targeted technology refresh and security upgrades, we ensure that the signaling system remains technically up to date, highly available and fully integrated into the existing infrastructure over more than two decades.
The new contract builds on an LTSS arrangement awarded in May 2024, which covers spares support, technical support and obsolescence monitoring. Together, these agreements establish a long-term framework under which Siemens Mobility, as original equipment manufacturer for the DTL signaling system, provides lifecycle management services that contribute to safer and more reliable operations through 2047.
Proactive obsolescence management: safeguarding a critical asset
A central element of the contract is the transition from reactive to proactive obsolescence management. All currently known and foreseeable obsolescence affecting the DTL signaling subsystems and components will be identified in advance and addressed through structured measures. This includes the assessment and definition of required development and qualification work for suitable redesigns, the implementation of redesigns at subsystem or component level, and the introduction of qualified replacement parts into applicable signaling equipment. Siemens Mobility will continuously monitor component lifecycles and adapt spare parts inventories accordingly. Subsequently, proactive obsolescence monitoring will be adopted to ensure long-term operational supportability, supported by adequate spare parts inventory and continuous monitoring of component lifecycles to prevent future disruptions. By maintaining the consistency of the DTL signaling system, commuters benefit from a dependable and efficient public transport network.
Long-term resilience of the network
The new service contract also includes structured system updates to address evolving security requirements over the contract period. Siemens Mobility will review system performance and configuration on an ongoing basis to ensure that new or updated hardware and software components are compatible with the local operating environment and can be integrated without compromising existing functionality.
