Now there's more polymer in the blend that makes it more pliable. But, Monahan added, with each new addition, each new material or method introduced, there is one basic question. A bad subgrade or the soil underneath a roadway can also cause a road to deteriorate faster. You need to start at the bottom and work your way up. Soils throughout the region vary from sand to heavy clay.
Some soil types drain better than others.
Anytime a subdivision goes in, the subgrade is inspected. That's the time for everybody to address it. Some local municipalities are looking at their specifications for construction of new streets in the hope that building them better initially will make them last longer. Ultimately, what I'd like to do is to have a geotechnical investigation done on soils. They have hired a geotechnical engineer to do soil borings throughout the city.