Rigs of Rods

Driving a vehicle onto a lowloader is almost impossible,
driving on submesh surface is like driving on ice,
there must be something wrong with the groundmodel.

For example try the yellow lowloader from the default game content and drive any truck onto it,
try stopping on the ramps and accelerating again slowly, it's almost impossible.

Driving on submesh has been difficult ever since I play RoR,
but it seems even worse now with the new traction code.