If you rode from Munich toward Austria until recently, part of your safety hinged on a signal station that went live in 1899 during Kaiser Wilhelm II's reign. Inside that small-house-sized hut in Mühldorf am Inn, operators hauled on heavy levers and cranks connected via cabling to points and signals so trains wouldn't collide.
That 126-year-old setup was finally replaced with electronics at the end of last year. Even so, nearly one in five of Germany's interlockings is still mechanical, a stark reminder of how modern rolling stock is outpacing the rails beneath it. Siemens Mobility CEO Michael Peter argues that digitizing the network would open up capacity without laying new track. "That's the big debate in Germany today: how do we increase throughput on the existing lines so that we have buffers again and can keep to the timetable better," he said. "It's all about punctuality and for that you need end-to-end technology."
Today's flagship ICE looks more like a rolling server room: about 1,000 sensors generate roughly 1 billion data points every day, according to Peter. Siemens Mobility's managed fleets travel around 1 million kilometers daily (621,370 miles), which is roughly comparable to almost three trips to the Moon. That stream lets software watch fleet health and catch odd behavior before parts actually fail. The company has also built remote startup capability, so a train can leave a depot and reach its first stop on its own, braking automatically if it finds something in the way.
The payoff would be smoother flows across a congested network. Right now, punctuality is rough. In September, a little more than half of Deutsche Bahn's long distance services pulled in within six minutes of schedule. Last year, the company logged an average of 6,831 infrastructure-related delays per day.
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Germany's rails are a patchwork assembled over more than a century, with roughly 100 different interlocking types that make upkeep harder and slow any move to a single digital playbook. "We have far too many mixed-bag situations on the railroad when it comes to digitization," said Dirk Flege, managing director at industry group Allianz pro Schiene. "There's far too little standardization, far too few standardized interfaces."
The technology to change that exists. Much of the safety logic that lives in local cabinets can be shifted to standardized processors in data centers. Trackside equipment would still be there, but centralized software could clear routes and issue commands to switches and signals.
A key building block is the European Train Control System, a common standard that tells drivers how far and how fast they may go. Within the European Rail Traffic Management System, its counterpart Automated Train Operation subsequently manages when to accelerate, cruise, and brake. Add AI on top and dispatching gets smarter, from easing a train because the next block is busy to moving another to the front after a delay, then rebalancing traffic back toward the plan.
Germany is early in this shift. By the end of 2025, just 683 kilometers of the more than 33,000 kilometer network were outfitted with ETCS. Neighbors set a high bar: Switzerland has used the system network-wide since 2018, and France, Spain, Italy, Austria and Switzerland all enjoy strong reputations for fast, reliable high-speed rail.
The rollout is harder because vehicles and tracks must be upgraded together. Deutsche Bahn even scrapped its previous ETCS migration approach in summer 2025, citing industry limits on equipping trains at the planned pace and uncertain federal funding at the time. Since then, over €10 billion has been earmarked for rail digitization out of a €500 billion national infrastructure fund.
Progress is uneven, though. Some aging mechanical or relay gear is still being swapped for older-style electronic interlockings instead of the newest, standardized networked systems.
There is momentum elsewhere. In the past month, Austria signed framework agreements totaling €2.6 billion ($2.9 billion) to upgrade signaling nationwide, with about €1.3 billion awarded to Siemens Mobility, part of Munich-based Siemens AG. For everyday travelers and taxpayers, the takeaway is simple: if Germany can standardize and digitize at scale, trains can run closer together and stay on time more often, without miles of new track. That means fewer missed connections and more predictable commutes, which is the payoff most of us actually care about.
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