Go to File -> Clean up -> Recursive Unused data-Blocks

After this it should import cars successfully

The Procedural traffic system requires a minimum version of 3.6.

Our 3D models and materials are compatible with versions 3.4, 3.5, 3.6 and above.

Yes, absolutely! Please follow tutorial on the bottom of Documentation.

Please contact us.

Yes! Yes! Yes! You can see the list of future updates on the bottom of the main page.

Don´t hesitate to contact us if you want to add any feature or want to ask about already existing ones :)

Cycles is fully supported with our procedural shader. In Eevee you will see only base material with color, metalic, roughness and clearcoat without imperfections (dirt, splashes..)

Make sure your curve is flat on Z axis (edit mode on curve -> A -> S Z 0)

To see changes you need to be on the first frame of your animation. If nothing still changes try deleting baked data on the bottom of settings panel.

If the problem still persists go check documentation or contact us directly, we are here to help :)