Heathrow Airport (IATA: LHR) is in the west of London (17 miles or 27 km from central London) and is one of the world's busiest airports. Heathrow is a giant, sprawling airport currently divided into five terminals (T1 through T5). It is the busiest airport in the world for international passenger traffic and is Europe's foremost hub airport. Due to its size, increased security requirements and the fact development hasn't kept pace with its growth, Heathrow has become over crowded and has developed a reputation for long queues, inefficiency and delays. However, since Terminal 5 opened in March 2008, and despite initial problems with the brand new terminal, this situation has begun to improve as more space becomes available.