What are the layers in a roman road?

There are three layers in a Roman road with each layer being laid with progressively larger stone. The top layer could be resurfaced when repair was needed. The roads were also higher in the center to allow for proper drainage.

There are three layers in a Roman road with each layer being laid with progressively larger stone. The top layer could be resurfaced when repair was needed. The roads were also higher in the center to allow for proper drainage.

There are three layers in a Roman road with each layer being laid with progressively larger stone. The top layer could be resurfaced when repair was needed. The roads were also higher in the center to allow for proper drainage.

There are three layers in a Roman road with each layer being laid with progressively larger stone. The top layer could be resurfaced when repair was needed. The roads were also higher in the center to allow for proper drainage.

There are three layers in a Roman road with each layer being laid with progressively larger stone. The top layer could be resurfaced when repair was needed. The roads were also higher in the center to allow for proper drainage.

There are three layers in a Roman road with each layer being laid with progressively larger stone. The top layer could be resurfaced when repair was needed. The roads were also higher in the center to allow for proper drainage.

There are three layers in a Roman road with each layer being laid with progressively larger stone. The top layer could be resurfaced when repair was needed. The roads were also higher in the center to allow for proper drainage.

There are three layers in a Roman road with each layer being laid with progressively larger stone. The top layer could be resurfaced when repair was needed. The roads were also higher in the center to allow for proper drainage.

There are three layers in a Roman road with each layer being laid with progressively larger stone. The top layer could be resurfaced when repair was needed. The roads were also higher in the center to allow for proper drainage.