How do I attach an object to a 3D solid object?

[whtjdwns001]

The above lane consists of a polyline with width value, a hatch

Roads are made of 3D solid objects, not flat.

[Kent1Cooper]

If you mean to attach an object that is not a 3D Solid to one that is, you could define them together into either a Group or a Block.

[imadHabash]

Hi,

You can try IMPRINT (Command)  >> Click << 

[whtjdwns001]

It was not resolved in any way. Can you be more specific? I'll give you the file, too.