Hot mix asphalt
This is the most common road surface. It is used on all new roads, roads throughout developments, mainline roads, and highways.
The typical county residential roadway section is 4" of asphalt placed over 8" of stone. The typical county business roadway section is 5" of asphalt placed over 10" of stone.
When the road needs to be resurfaced, 1-1/2 inches of asphalt is placed over the existing road. This surface usually lasts 15 to 20 years.