
FORNEBUBANEN
Fornebubanen in numbers
- 6 train stations connecting Majorstuen and Fornebu
- € 1.8 billion Euros
- Capacity increase from from 3 000 to 6 400 passengers per hour
- 8.2 km of tunnels under ground
- Work starts in 2019 and ends in 2025
Fornebubanen
Aligning vision, discipline, and delivery in Norway’s largest infrastructure project
When completed in 2025, Fornebubanen will transform Oslo’s connectivity—linking Fornebu and Majorstuen through six new underground stations and 8.2 kilometers of tunneled rail. With an investment of €1.8 billion and capacity doubling to 6,400 passengers per hour, this is the most ambitious public transit project Norway has undertaken in over 20 years.
But delivering something this ambitious isn’t just about scale—it’s about clarity.
From early-stage design all the way through to engineering coordination and stakeholder approvals, the challenge has been aligning many disciplines, each working with different models, assumptions, and tools. Add in signature architecture from Zaha Hadid and the logistical complexity of tunneling under Oslo’s urban terrain, and the risks of misalignment multiply quickly.
“The biggest BIM coordination project I’ve experienced”
That’s how Angie Mendez, project lead architect at A-lab, describes it.
The scale of the BIM environment is only half the story. What makes it even more complex is the coordination required across geographically distributed teams—including Zaha Hadid Architects in London—and the sheer volume of design reviews, issue tracking, and interdisciplinary negotiation required to keep the project aligned and on schedule.
That’s why the Fornebubanen team adopted Vrex.
Why immersive design matters on a project like this
Traditional tools (like Navisworks, PDFs, and clash reports) help with model fidelity—but not with human understanding. In complex capital projects, misalignment doesn’t always stem from technical errors. It comes from different mental models, misunderstandings in design intent, and late-stage discovery of problems that could’ve been caught earlier.
Vrex changes that. It transforms BIM data into a shared, immersive environment where all stakeholders—from subcontractors to safety leads to regulatory reviewers—can explore, comment, and align around what’s being built. Together. In real time.

Immersive clarity improves coordination outcomes
Here’s how Vrex contributes to tangible value
- Earlier detection of issues across disciplines: Engineers, contractors, and architects identify not just clashes, but installation and operability risks that typical tools can miss. Inside Vrex, even non-BIM experts spot flaws that affect their work.
- Continuous reviews, not delayed meetings: Instead of waiting for big-room meetings, stakeholders can jump into Vrex as needed, review models live, and link their insights directly back into BIMcollab and Autodesk platforms via BCF. That saves weeks of delay and miscommunication.
- Improved decision speed and stakeholder alignment: Design approvals happen faster when decision-makers truly understand what they’re signing off on. With VR, clarity accelerates consensus—especially when team members can’t travel.
- Fewer surprises in the field: The earlier a mistake is caught, the cheaper it is to fix. That’s why Vrex focuses on the pre-construction phase, where visibility is highest but cost of correction is lowest.
Triple-bottom-line performance—not just technical delivery
Using immersive collaboration on Fornebubanen wasn’t just about managing models. It was about managing risk, budget, and people.
- Environmental gains: Less travel and fewer late fixes mean a lower carbon footprint.
- Social gains: Teams spend less time commuting, more time aligning—and fewer hours firefighting.
- Economic gains: Fewer errors and change orders reduce cost exposure across phases.
Vrex: Built for projects that can’t afford misalignment
Fornebubanen isn’t just a landmark for Oslo. It’s a case study in how early-stage immersion can replace late-stage regret.
If your coordination meetings still feel like you’re “almost aligned,” maybe it’s time to get inside the model—literally.
Start a pilot. If your last review ended with more confusion than clarity, you’ll see why we exist.

Industry insight
Most large infrastructure projects—especially rail and tunnel-based transit systems—fail to deliver on time and on budget.
McKinsey data shows that 80% of large infrastructure projects run over schedule, and 20–45% exceed budget by significant margins.
In underground rail specifically, scope creep and late discovery of design conflicts are top drivers of overruns, often due to insufficient early-stage coordination across systems (tunnels, ventilation, signaling, safety).
BIM alone is not enough. Studies show that 48–52% of rework is caused by miscommunication, even when models are in place.
Rail infrastructure carries heavy regulatory and safety requirements. Late-stage modifications in tunnel or station builds cost up to 5–10x more than changes made pre-construction.
Start a pilot
If your last review ended with more confusion than clarity, you’ll see why we exist.

