The Death of the Monolithic TMS

What Comes Next for Cities?

15th July 2026 - Alistair Gollop for ITS Now

For more than three decades, the Traffic Management System (TMS) has been the beating heart of urban operations. It has sat in control rooms, humming away behind racks of servers, quietly orchestrating signals, monitoring flows, and providing operators with the situational awareness they needed to keep cities moving. It was the command centre, the single pane of glass, the system of record. For a long time, it worked.

But cities have changed, expectations have changed, and the monolithic TMS, which was once the proud centrepiece of urban traffic operations, is now struggling to keep pace with a world that no longer behaves in neat, predictable patterns. The age of the single, all-encompassing traffic management platform is ending. A new era is emerging of modular, API-driven, interoperable, and built for continuous evolution.

This is the death of the monolithic TMS, and the question now is not if it will be replaced, but what will replace it.

The traditional TMS was designed for a simpler world. A world where cities managed fixed assets, predictable flows, and a limited set of modes. A world where traffic signals, CCTV, VMS, and detectors were the primary tools of the trade. A world where operators could reasonably expect to understand what was happening on the network because the network itself was relatively stable. A world where cities had large specialist traffic teams to operate the TMS and their network.

That world has gone.

Today’s mobility ecosystem is a swirling mix of public transport, active travel, micro-mobility, freight, ride-hail, connected vehicles, kerbside operations, and on-demand services. Data pours in from thousands of sources. Conditions change minute by minute. Travellers expect real-time information, personalised routing, and seamless multimodal journeys. Operators must manage not just roads, but mobility.

The monolithic TMS, with its rigid architecture, proprietary interfaces, and slow upgrade cycles, simply cannot keep up. It cannot ingest new data sources quickly enough. It cannot integrate emerging technologies without costly customisation work. It cannot adapt to new operational models, and it cannot provide the flexibility cities need to innovate at the pace the market now demands.

Cities are discovering that the TMS they once relied on has become the bottleneck.

The replacement for the monolithic TMS is not another monolith. It is an ecosystem.

Cities are moving toward modular, API-driven architectures built around open standards, cloud-native services, and plug-and-play components. Instead of one giant system doing everything, they are assembling a suite of specialised capabilities that work together through well-defined interfaces.

This shift mirrors what has already happened in other sectors. Finance, retail, logistics, and energy have all moved away from monolithic platforms toward distributed, service-oriented architectures. Transport is now catching up.

The emerging model typically uses a central data platform that ingests, cleans, stores, and distributes mobility data from every source, a suite of operational modules for traffic signal control, incident management, congestion detection, demand prediction, event planning, network optimisation, each delivered as independent services, a real-time decision engine capable of orchestrating actions across modes, a flexible operator interface and a marketplace of third-party capabilities that cities can adopt without ripping out existing infrastructure.

In this world, the TMS is no longer a single product. It is a collection of interoperable services that together deliver the intelligence layer cities need to manage mobility.

This is precisely where the commercial strategies of large players in the sector, such as Yunex Traffic and Swarco, become so influential, particularly in the British market.

For years, the UK’s traffic management landscape has been shaped by a handful of major suppliers offering variations on the familiar monolithic model. But as the modular paradigm takes hold, Yunex Traffic and Swarco have emerged as the two companies most actively reshaping expectations.

Yunex Traffic, with its Fusion adaptive control system and increasingly cloud-native portfolio, has positioned itself as one of the most assertive champions of modularity. Fusion is not just a product, it’s a philosophical pivot. It embodies the idea that signal control should be a service, a standalone capability that can plug into whatever ecosystem a city chooses to build. By decoupling adaptive control from the traditional command-and-control architecture, Yunex has given UK authorities a glimpse of what a future Mobility Operating System might look like: interoperable, data-driven, and capable of evolving continuously.

Fusion’s impact on the British market has been significant. It has forced authorities and competitors to rethink what “modernisation” actually means. Instead of upgrading a whole TMS, cities can now enhance specific capabilities. Instead of being locked into proprietary interfaces, they can adopt open APIs and integrate third-party services. Instead of waiting for multi-year upgrade cycles, they can deploy new modules as soon as they’re ready. Fusion has become a catalyst for modular thinking, and its presence in UK procurement conversations has nudged the market toward a more agile, service-based future.

Swarco, meanwhile, has taken a slightly different but equally influential path. Where Yunex has leaned into modularity through cloud-native control and open interfaces, Swarco has focused on building a broad, interoperable ecosystem that spans hardware, software, and services. Their MyCity platform is a clear example with a suite of modules that can be deployed independently or combined into a cohesive operational environment. MyCity doesn’t pretend to be a monolithic TMS, instead, it acts as a connective tissue, allowing authorities to integrate existing assets, adopt new capabilities, and evolve their operations without ripping out legacy infrastructure.

This approach has resonated strongly in the UK, where authorities often face the challenge of modernising incrementally rather than through wholesale replacement. Swarco’s commercial offer acknowledges this reality. It gives cities a pathway to modularity that feels achievable, pragmatic, and aligned with budget cycles. MyCity’s ability to sit alongside existing systems, rather than replace them outright, has made it particularly attractive to authorities who want to innovate without destabilising their operational environment.

Together, Yunex Traffic and Swarco have created a competitive dynamic that is reshaping the British market. They have normalised the idea that traffic management should be modular. They have demonstrated that cloud-native services can coexist with roadside infrastructure. They have shown that open APIs are not a risk but an enabler. They have pushed the conversation away from “Which TMS should we buy?” toward “Which capabilities should we assemble?”

This shift has had several knock-on effects. Smaller, specialised vendors now have clearer pathways into UK cities because the ecosystem is more open. Authorities are beginning to think in terms of service portfolios rather than monolithic procurements. Innovation cycles are accelerating because new modules can be deployed without waiting for major system upgrades. In the UK market, which historically is cautious and often constrained by legacy systems, is becoming one of the most interesting testbeds for modular mobility management in Europe.

The traditional TMS is being replaced not by a single product, but by a new operational paradigm. A platform of shared services that allows cities to manage mobility as a system rather than a collection of modes. Data ingestion and fusion, real-time analytics, decision support, automated control, operator dashboards, and public-facing APIs, all delivered through modular, interoperable components.

The monolithic TMS is dying. What replaces it is smarter, faster, more adaptable, and far more aligned with the complexity of modern mobility. Cities are not just managing traffic anymore. They are managing movement. And movement demands intelligence, interoperability, and agility. The future belongs to the modular.