Complex sentence: Macadam is a type of road construction, pioneered by Scottish engineer John Loudon McAdam around 1820, in which single-sized crushed stone layers of small angular stones are placed in shallow lifts and compacted thoroughly.
Split into simpler sentences: Macadam is a type of road construction pioneered by Scottish engineer John Loudon McAdam around 1820. Single-sized crushed stone layers of small angular stones are placed in shallow lifts and compacted thoroughly.