Training that includes periphery compressive protects sidewalks and driveways from fringe collapse from foot traffic, bikes, and other vehicles.

https://www.scribd.com/document/978894473/Is-3-000-Too-Much-Concrete-Contractor-Rules-of-Thumb-for-Repair-vs-Replace-125809

Training that includes boundary compression protects bicycles, bicycles, and other types of vehicles from border collapse on sidewalks and driveways.