for short and long term parking. A car hire centre is located in the terminal complex. The airport is served by a fleet of dedicated airport taxis, which operate from taxi ranks in front of the arrival areas. Alternative chauffeur driven airport limousines can be arranged. The airport can legally be reached by bicycle on a regional highway (Flughafenstrasse and Birchstrasse) that branches off national highway 4 (Schaffhausen - Bülach - Zürich - Luzern) just east of the airport and reaches Northwestern Zürich. Other facilities The Circle The Circle, a complex intended to include a medical center, a conference center, shops, restaurants, offices, and hotels, is under construction opposite the Airport Centre. In February 2009, Flughafen Zürich AG (FZAG) launched a three-stage architectural competition for "The Circle at Zurich Airport" development. Around 180,000 square meters of usable space for services were to be built close to the terminals on a 37,000 square meter site. Two hotels and the congress area will occupy around 45,000 square meters, which will be operated by the Hyatt Corporation. At the end of October 2011, FZAG submitted the building application to the town of Kloten, which granted the building permit on 6 March 2012. The groundbreaking ceremony for the superstructure, scheduled for the end of 2013, was postponed until the beginning of 2015. The Circle" is expected to create around 5,000 new jobs, with an investment volume of around CHF 1 billion. The foundation stone was laid on 24 March 2017 and the opening is expected to take place in the first half of 2020; however, even then not all six parts of the building will be ready. In the meantime, it has been announced that the opening will take place in September 2020. Company headquarters Several companies have their headquarters on or about the airport. These include Swiss International Air Lines, Swiss World Cargo, Swiss AviationTraining, Edelweiss Air, gategroup, Helvetic Airways, Swissôtel, and Rega. Other companies that were formerly based on the airport include Swissair and Crossair. Safety and environment Airport fire department The airport fire brigade is responsible for fire-fighting at Zurich Airport and is on standby around the clock. In the event of an emergency, the brigade must be able to reach any location on the airport grounds, an area of 880 hectares, in no more than three minutes in accordance with international standards. Their vehicles have extremely powerful engines and large-capacity