Grooving has significantly reduced accidents on pavements that exhibit a low co-efficient of friction or high accident rate. Signs installed on some sections of highway indicate that the highway surface has been grooved when it has, in fact, been cold milled by equipment using carbide-tipped teeth to cut the surface.
Grooving of highway surfaces is defined as that accomplished with diamond impregnated blades. The grooves are constructed to a width of between 0.116 to 0.080 inch and spaced approximately 3/4 inch on centers. The depth of grooves is in the range of 1/8 to 1/4 inch.
Another texture is that developed by diamond grinding of Portland cement concrete pavements. Grinding is done to bring the pavement back to new-pavement smoothness tolerance.