Maximum number of vehicles per convoi

[MHD]

Just a small question:

When I put together a rail convoi, there seems to be no limit (except for the power of vehicles), how many vehicles can be put together.

When I try the same with road vehicles (by setting for example constraints in the dat-file), I cannot exceed 4 road vehicles, which I can put together. Is that true, that this is an in-game limit?
Or is it rather some problem in the dat-File?

MHD

[Dwachs]

That is an in-game limit. Trains should not exceed 24 vehicles though

[MHD]

Thanks a lot!