Construction remains Europe's deadliest sector, despite decades of regulation. A new generation of interconnected sensors, autonomous machinery and digital platforms can communicate and respond collectively to risks before accidents happen. But experts warn: the technology already works — what's missing is the capital, the skills and the trust to scale it.

By Martino De Mori

On a renovation site in La Garriga, Spain, a construction worker steps near an active crane. Before he even looks up, the sensor in his helmet vibrates — the system has already registered how close he is. Inside the site office, a screen flashes an amber alert: temperatures have crossed a threshold, and the platform recommends pausing outdoor work and increasing water breaks. Nobody shouts. Nothing stops. The site has simply done what construction has rarely managed at scale: see everything happening, all at once, in real time. It is also still the exception.

Construction safety: strong rules, a persistent implementation gap

According to Eurostat, the EU recorded 2.82 million non-fatal workplace accidents in 2023 and 3,298 fatal ones — twelve more than the year before. Nearly one in four of those deaths, 24%, occurred in construction: the single worst share of any sector. Together, transport, manufacturing, agriculture and construction account for two-thirds of all fatal accidents at work in the EU. Workers in the sector have historically been three times more likely to die on the job than the average European employee.

Europe's regulatory framework is, on paper, among the most comprehensive in the world. Good regulations, though, do not automatically translate into safer sites. "Over the past 20 years, workplace accidents and fatalities in European construction have fallen by around 30 to 40%," says Domenico Campogrande, Director General of the European Construction Industry Federation (FIEC). "But construction sites are constantly changing environments, where multiple contractors and activities take place simultaneously, and workers are regularly exposed to high-risk tasks such as working at height or operating heavy machinery — that is what keeps construction among Europe's highest-risk industries." We need rules. “Good ones are good for occupational safety and health — and for business," says Annick Starren, Senior Research Project Manager at EU-OSHA, the European Agency for Safety and Health at Work, whose research on supporting compliance shows that legislation alone is not enough: enforcement, prevention services and the size of the enterprise all shape whether standards are actually followed on the ground. "Compliance is more than strict regulations," she points out. "On the one hand, we look at the regulation and inspection perspective, and how it can be improved. On the other hand, we look at what supports compliance in a more proactive way — organisational measures, collaborative measures or other forms of support."

Bringing construction site data together for better coordination and safer work

This is precisely the gap REN+HOMES set out to address with its resilient construction site (RCS), a digital safety system tested across four demonstration sites: the renovation in La Garriga, student dormitories turned into a positive energy building in Cluj-Napoca, Romania, new hydrogen-heated apartments for young people in Innsbruck, Austria, and prefabricated green-wall renovations of student and family housing in Tallinn, Estonia. "The tools exist — sensors for safety, environmental monitoring, waste tracking — but they all work separately and they don't talk to each other," explains Jairis Arleen Alvarez Trujillo, Project Manager for Research and Development at RINA Consulting. "We wanted to bring all relevant information into a single platform, allowing stakeholders such as project managers and facility managers to instantly understand what is happening on site,” she adds. “However, the tool is not intended to replace the site safety engineer; rather, it serves as a decision-support tool that enhances visibility, coordination, and situational awareness." The platform organises that information into four dashboards: waste management, real-time monitoring, historical data and safety. The waste dashboard alone tracks quantity, quality and cost, scoring each site on a scale from 1 to 3. "Most of the sites were able to recycle most of their material, which is good," Alvarez Trujillo notes — a small but telling sign of how digitalisation can support circularity on site, not only safety. On the environmental side, the system has flagged extreme heat days with automatic recommendations to pause outdoor work and increase water breaks, and has shown noise levels across the pilots consistently staying below regulatory limits. "It means the workers were working in a safe environment," she says.

One of the platform's specific targets is the blind spot of every crane operator. "He cannot see the entire site unless he turns 360 degrees," Alvarez Trujillo says. "With our sensor, the operator sees in real time where the workers are, and a vibration alert warns them if they step into a high-risk perimeter." The system was deliberately built for small-scale renovation works — among the least digitalised and least monitored corners of the industry. "If you can digitalise a small site, it means it can be replicated on larger ones, which usually have more resources to do it," she explains. Scaling it further across Europe, she admits, is not automatic. "Construction regulations and standards differ from country to country, so the tool needs to be adapted to each one." The next step, she adds, is integrating the platform with building information modelling (BIM) systems, so that safety, environmental and waste data become part of a single digital thread running through the entire life of a construction site.

A complementary approach is being tested by Beeyonders, another EU-funded project, on road construction sites in Italy — including a trial on the A24 motorway near L'Aquila. Workers wear connected vests; an autonomous loader, linked through a digital twin and a drone, stops automatically when it detects a worker nearby. "The machine doesn't just react — it already knows their position before the work begins," says Fabrizio Federici, the project's lead for autonomous machinery and wearables at AISCAT Servizi. "That's the difference between safety as a response and safety as a prerequisite." By continuously recalculating the loader's route around obstacles and workers, the Italian demo site also recorded an 11% drop in energy consumption.

Scaling construction technology: integrating isolated pilots into user-centred workflows

So why isn't this everywhere yet? For Campogrande, the answer has little to do with whether the technology works. "The main barrier is the difficulty of turning isolated pilots into reliable, integrated construction workflows," he says. Upfront costs are high for the small and medium-sized firms that dominate the sector, and returns are uncertain in a low-margin, project-by-project business. "Construction goes from one project to another," Campogrande explains. "We need to make sure an innovation can be used across several, not just one — that means improving industrialisation."

There’s another important issue. Scaling responsibly, Starren argues, also means designing technology around the people who use it. "Do not automate for the sake of modernisation," she says. "It is key to have end users represented in the design phase, not just the implementation phase. Next to privacy aspects and transparency in how AI is exactly used, the most important element is task autonomy and task variety." Jobs reshaped by sensors and AI should stay balanced, and accountability should stay where it belongs. "The responsibility for safety remains with the employer," she stresses. "It cannot be outsourced to an AI-based machine." She expects the pace of change — AI, robotics, automation — to outrun the institutions meant to govern it. "We might need an agile government that responds to these changes faster," she says. "Standardisation bodies and inspections also need their skills updated, in an already tight labour market."

From safety rules on paper to safer construction sites on the ground

Vibrating helmets and all-seeing screens are not futuristic props. They are an early, working sketch of what construction could look like once prevention — not response — becomes the default. The question, as Campogrande puts it, is: what would it take for that to stop being the exception? "Construction needs investments, acceptability by companies and workers, and legal stability and clarity," he says. Starren adds that it is important for measures to be accepted by their users, and to be realistic: “How many rules do you know in your daily life or at work that are only there for regulation, but are not practical, and sometimes even inhibit good performance?". The direction, though, looks set. Sites that can already see a worker before a crane swings too close, or flag a heatwave before it becomes a health risk, point to a construction industry capable of anticipating risk rather than counting it afterwards. Getting there at scale, across thousands of sites and dozens of regulatory regimes, will take time. But the building blocks — sensors that talk to each other, machines that yield to people, data turned into a warning before it is too late — are no longer experimental. The next decade of European construction may be remembered less for the accidents it failed to prevent, and more for the moment it learned how to see them coming.