  In the last years the interconnection and ongoing development of physical
systems combined with cyber resources has led to increasing automation. Through
this progress in technology, autonomous vehicles, especially autonomous trains
are getting more attention from industry and are already under test. The use of
autonomous trains is known for increasing operation efficiency and reduction of
personnel and infrastructure costs, which is mostly considered for main tracks.
However, for less-used secondary lines, autonomous trains and their underlying
sensor infrastructure are not yet considered. Thus, a system needs to be
developed, which is less expensive for installation and operation of these
trains and underlying infrastructure for secondary lines. Therefore, this
position paper describes the process of how to derive an approach to help
develop a digital interlocking system at design time for the use with secondary
railway lines. In this work, we motivate the necessary research by
investigating gaps in existing work as well as presenting a possible solution
for this problem, a meta-model. The model considers safety, security as well as
interoperability like 5G and socio-technical aspects to provide a holistic
modeling approach for the development of the interlocking system for industrial
secondary line use cases.
