Which material is commonly used for the surface layer of flexible pavements?

Which material is commonly used for the surface layer of flexible pavements?

Step 1: Understand what flexible pavements are. They are types of roads that can bend and flex without cracking.
Step 2: Identify the surface layer of flexible pavements. This is the top part that vehicles drive on.
Step 3: Learn about materials used for this surface layer. There are different materials, but we are looking for the most common one.
Step 4: Discover that asphalt is the most common material used. It is chosen because it can flex and is easy to repair.
Step 5: Conclude that asphalt is the answer to the question about the material used for the surface layer of flexible pavements.

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