A “TxDOT road base,” also commonly called “flexible base” in Texas Department of Transportation (TxDOT) terminology, refers to a granular, unbound material used as a foundational layer beneath asphalt or concrete pavement, providing structural support and stability to the road surface, typically composed of crushed stone or gravel that is compacted to a specified density according to TxDOT specifications, primarily identified as “Item 247” in their construction manuals;. 

• Specification: Referred to as “Item 247” in TxDOT documents, which outlines the material properties, compaction requirements, and construction methods.
  
• Applications: Used for building new roads, repairing existing pavements, temporary access roads, and stabilizing subgrades.