Gibraltar International Airport is unusual not only because of its proximity to the city centre resulting in the airport terminal being within walking distance of much of Gibraltar but also because the runway intersects Winston Churchill Avenue, the main north–south street, requiring movable barricades to close when aircraft land or depart. New roads and a tunnel, which will end the need to stop road traffic when aircraft use the runway, were planned to coincide with the building of a new airport terminal building with an originally estimated completion date of 2009, although it has not been completed because of delays.