Two variants of trailer trees are available.
One variant where a scenario with a truck pulling multiple trailers is represented by one tree containing all the trailers,
with each trailer on a separate branch of the tree.
The other variant where the same scenario is represented by multiple trees, one tree per trailer.
The vspec trailer tree is a super tree that contains signal definitions for a large set of different trailer types. The vspecPreprocessor can then be used to configure it for a specific trailer type and model.
An initial list of trailer types that are planned to be supported by the vspec files are:
Further trailer types are planned to be added to the list.