How MONOCAB can reactivate disused railway lines

The challenge is clear. In many rural regions connectivity decreases while private car use rises. Disused railway lines cross the country. Infrastructure lies idle while communities look for affordable mobility solutions. Autonomous monorail vehicles address this need. With new technologies they offer a realistic alternative that uses existing infrastructure in a new way.

One possible approach is the MONOCAB concept, an autonomous vehicle that runs on a single rail. Its gyroscopic stabilisation enables safe bidirectional traffic on single-track lines. It allows tight headways and on-demand operation. This means communities can use the potential of existing infrastructure in an efficient way. As individual traffic shifts to rail, the potential for CO₂ reduction increases. Because the MONOCAB is an autonomous solution, it offers flexible availability.

Autonomous operation makes MONOCAB economically attractive. This connects directly to the close cooperation with the enableATO project. It is one of the flagship projects of the German Centre for Future Mobility. Launched in 2024, it is expected to run until the end of 2026. Its goal is the development and testing of fully automated train-operation functions at GoA4 level Automated Train Operation without onboard staff.

At the core of the enableATO consortium is the development of a comprehensive ATO technology Automated Train Operation. Parts of this technology can be tested in MONOCAB and include the following functions:

• Perception: advanced sensors for interior and exterior
  The sensors capture the surroundings and monitor passengers. They observe the track and the safety of passengers inside the vehicle.
• Self-localisation: precise positioning on the track
  Innovative methods determine the vehicle’s position on the track with precision. This self-localisation forms a key basis for reliable autonomous operation.
• Obstacle detection: real-time identification
  Real-time detection of obstacles ensures high operational safety. The system identifies objects on and alongside the track and initiates appropriate measures when needed.
• Speed planning and control: intelligent management
  Intelligent management of speed ensures optimal traffic flow and safety. These are decisive advantages where headways are short and capacity is high.

Autonomous monorail vehicles like MONOCAB offer the chance to use disused infrastructure intelligently without the financial effort of building new lines. Their advantages are compelling.

• Cost efficiency: use of existing tracks instead of new construction
• Flexibility: on-demand operation for needs-based mobility
• Sustainability: electric propulsion, modal shift from car to rail, CO₂ savings

At mid-term the project shows strong progress. The concepts stand, and the integration of initial ATO components into the MONOCAB demonstrator is in full swing. In parallel the teams work on approval questions, system integration into existing infrastructures and user acceptance.

Autonomous monorail vehicles are not an unrealistic future vision. With MONOCAB and enableATO, the DZM site in Minden shows how research and technology open new opportunities for rail where traditional approaches reach their limits. Flexible autonomous monorail vehicles can help rethink rural mobility in ways that are economically viable, demand-driven, environmentally responsible and socially inclusive.

Here you can find more information about the MONOCAB project.