Blacktop is a type of asphalt and is usually used to refer to driveway surfaces. Tarmacadam is often referred to by its brand name of ‘Tarmac’. Blacktop, tarmacadam and asphalt are very common around NJ. The binder in Tarmacadam is tar, whereas blacktop/asphalt uses a bitumen binder. The terms are often all used interchangeably.