Tarmacadam, properly referred to as bituminous macadam or "Bitmac" for brevity, is often thought to be the cheapest method of surfacing a driveway or forecourt, but for smaller areas it can work out quite expensive, and the red tarmacadam can be more expensive than block paving.

Tarmacadam has become a popular, although technically incorrect, term for both bitmac and for asphalt used to surface pavements, highways and even internal floors.