The term ROAD MATERIALS can be summarized by the crossword solution TARS, which is an acronym for 'tar and chip' or 'tar and gravel' materials. These materials are used to pave roads and are made up of a combination of tar and either gravel or chips of stone. Tar is a sticky, black material that binds the gravel or chips together, creating a strong and durable surface. This type of road material is often used in rural areas where the roads are not heavily trafficked.