Airports are divided into landside and airside. Landside includes areas such as check-in, parking lots, public transport railway stations and access roads. Airside includes all areas accessible to aircraft, including runways, taxiways and apron/ramps. Passage between landside and airside is tightly controlled at all airports. To access airside, one must go through Security, and if applicable, Passport Control too. This applies to everyone, including staff.
Most major airports provide commercial outlets for products and services. Airports may also contain premium and VIP services. The premium and VIP services may include express check-in and dedicated check-in counters. In addition to people, airports move cargo around the clock. Many large airports are located near railway trunk routes.