About 100 trips will be made by a barge transporting soil and crushed stone five miles (8km) from Sharpness Docks to Cambridge Bridge.

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Old carriage houses and other traditional driveways of the past would often have strips of grass in between the track areas, or their designs would include naturally permeable materials, like crushed stone.

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The "stone" walls are actually a mix of cement powder and crushed beer bottle or windshield glass.

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