Grass removing method

I use this method to remove grass from the surface. But today I noticed that
he also cleans the roads. Someone can confirm if this works for road traffic
or not? 1. Create a material. Name: GrassRemove, Type: CodeDiffuse, Surface:
Paint 2. Create an Albedo texture. 4x4px, transparent 10% black 3. Add
texture to new material. 4. Draw poly witth this matterial.

Best way of removing grass I have found is to simply place an Apron - with any
hard surface - and then ramp down the Opacity to zero in the Apron Properties.
Voila, no grass.