Tarmacs

The airport apron is the area of an airport where aircraft are parked, unloaded or loaded, refueled, or boarded. Although the use of the apron is covered by regulations, such as lighting on vehicles, it is typically more accessible to users than the runway or taxiway. However, the apron is not usually open to the general public and a license may be required to gain access. The use of the apron may be controlled by the apron management service (apron control or apron advisory) to provide coordination between the users. The apron is designated by the ICAO as not being part of the maneuvering area. All vehicles, aircraft and people using the apron are referred to as apron traffic. ... Many people in the general public and news media incorrectly refer to the apron at airports as "the tarmac" despite the fact that most of these areas are often paved with concrete not tarmac, often referred to as PQ (Pavement Quality) concrete. [Airport apron. Wikipedia]