Innovation Project Aims to Reduce TMA Collisions

Sigma Technology is collaborating with Telia, RISE, the Swedish Transport Administration (Trafikverket), Svevia, and Halmstad University in an innovation project CyberInfra aimed at reducing dangerous roadwork-related accidents.

Approximately every fifth day, a TMA vehicle is hit on Swedish roads. A TMA truck (Truck-Mounted Attenuator) is a specialized vehicle equipped with crash cushions and digital signs that warn and guide road users through roadwork zones. In 2022 alone, 70 such collisions occurred, several of which resulted in injuries. Now, Sigma Technology Embedded Network, together with Telia, RISE, Trafikverket, Svevia, and Halmstad University, is launching a major innovation project to significantly reduce these incidents using 5G technology, real-time data, and intelligent digital signage.

Within the CyberInfra project, today’s static warning signs on TMA vehicles are being transformed into intelligent, connected units that automatically adapt warnings based on traffic flow and send real-time information to both road users and traffic control centers.

“Every collision is a potential tragedy. With 5G-based communication and real-time data, we can warn faster and prevent accidents before they happen,” says Danilo Chinchilla, President at Sigma Technology Embedded Network.

The technology builds on 5G Standalone (SA), part of Telia and Ericsson’s joint innovation program NorthStar. 5G SA is critical, enabling dedicated network slicing, lower latency, and robust connectivity for safety-critical functions.

The project also includes developing blockchain-based data protection and advanced PKI (Public Key Infrastructure) solutions to ensure that traffic information remains traceable, tamper-proof, and safely usable in central mobility systems.

“If we could scale up this solution, we would see safer roadworks not only for the people working there but also for other motorists,” says Johannes Berg, Innovation Manager at the Swedish Transport Administration.

Watch a video from the project:

More About the CyberInfra Project

• CyberInfra is funded by Vinnova through the “Advanced Digitalisation” program and runs until spring 2026.
• The project transforms the TMA vehicle’s digital signage from static warning systems into intelligent, 5G-connected units. By combining real-time data with sensors such as cameras and radar, the signs can dynamically update warnings based on current traffic conditions while sending insights back to the traffic control center. This enables secure two-way communication between roadwork vehicles, central traffic systems, and road users with the goal of reducing accidents and improving working conditions.
• Blockchain-based immutability and PKI are key components in ensuring secure and reliable data communication for critical road traffic infrastructure.
• Testing is carried out at RISE’s AstaZero proving ground for automated transport systems as well as in real-world roadwork environments. These tests aim to evaluate the effectiveness of the new infrastructure and provide valuable insights for developing future digital traffic systems.
• CyberInfra builds on previous feasibility studies focused on improving the safety of TMA-based roadwork closures.

For more information, please contact:

• Danilo Chinchilla Sosa, President at Sigma Technology Embedded Network, danilo.chinchilla@sigmatechnology.com.
• Nataly Lamkén, Chief Communications Officer at Sigma Technology Group, nataly.lamken@sigmatechnology.com.