The region below the finished grading template on which the paving materials rest is called what?

The region below the finished grading template where paving materials are placed is known as the subgrade. The subgrade serves as the foundation for the pavement and is crucial in providing support and stability. Proper preparation of the subgrade is essential to ensure that the pavement remains level and durable under load. It typically consists of the natural soil that has been compacted and graded to achieve the correct elevation and support the layers of materials above, such as the base and paving.

Understanding the importance of the subgrade helps in assessing its role in ensuring that the paving materials function effectively and have a long lifespan, making it integral to the overall pavement structure.