Interurban Project “A1 Reusstal – Neuenhof”

The challenge

The “A1 Reusstal – Neuenhof” project involved the comprehensive renewal of traffic control infrastructure on one of Switzerland’s busiest motorway sections, located on the A1 in the Greater Zurich Area. The 12 km stretch includes two tunnels with a total of five tubes and carries more than 100,000 vehicles per day.

A key challenge was to specify, deliver, install, and commission a modern signalling and traffic management system while maintaining continuous traffic flow. Due to the high traffic volumes and the complexity of tunnel operations, meticulous phase planning and close coordination with neighbouring systems were essential. At the same time, the system had to comply with strict national guidelines issued by the Swiss Federal Roads Office (FEDRO), particularly regarding speed harmonisation and danger warning functions.

The process

The project, implemented between 2020 and 2025, was commissioned by the Swiss Federal Roads Office (FEDRO) with a contract volume exceeding €3 million. It covered the full scope of signalling and traffic control for both tunnels along the motorway section.

At the core of the implementation was the deployment of the MyHighway traffic management and control system. Along the 12 km route, more than 580 dynamic signals were installed and integrated. Traffic data is collected via 95 overhead radar sensors and processed through 56 roadside units distributed along the motorway.

Special attention was given to implementing speed harmonisation and danger warning functions in accordance with national FEDRO standards. Intelligent traffic algorithms were configured to enable automated congestion prevention, traffic flow harmonisation, and semi-automatic lane transfers for two-way traffic operations.

The system was fully integrated into the higher-level control environment and connected to neighbouring traffic management systems. Modern IT standards were applied, including OPC UA interfaces, a VMware-based system architecture, Active Directory support, secure remote access via reverse proxy, and industry-standard backup and release management procedures.

The solution

The project, implemented between 2020 and 2025, was commissioned by the Swiss Federal Roads Office (FEDRO) with a contract volume exceeding €3 million. It covered the full scope of signalling and traffic control for both tunnels along the motorway section.

At the core of the implementation was the deployment of the MyHighway traffic management and control system. Along the 12 km route, more than 580 dynamic signals were installed and integrated. Traffic data is collected via 95 overhead radar sensors and processed through 56 roadside units distributed along the motorway.

Special attention was given to implementing speed harmonisation and danger warning functions in accordance with national FEDRO standards. Intelligent traffic algorithms were configured to enable automated congestion prevention, traffic flow harmonisation, and semi-automatic lane transfers for two-way traffic operations.

The system was fully integrated into the higher-level control environment and connected to neighbouring traffic management systems. Modern IT standards were applied, including OPC UA interfaces, a VMware-based system architecture, Active Directory support, secure remote access via reverse proxy, and industry-standard backup and release management procedures.