This wooden box is a GT Tester.
If your car is too tall to be GT, it will crash with the box :)
Add the .gmt and .dds files to the Zaluzani files.
If you don't want to replace the .trk file, just add to your .trk file:
Instance=sign_woodbox
{
Moveable=True
MeshFile=sign_woodbox.gmt...