The airport serves as a base for easyJet Switzerland and mainly features flights to European metropolitan and leisure destinations.Basel-Stadt's Grand Council agreed to pay the costs for a provisional airport even before an international treaty was signed (which was not until 1949).[citation needed] Between autumn 1951 and spring 1953, the east–west runway was extended to 1,600 m (5,200 ft) and the "Zollfreistrasse"(fr:Route douanière de l'aéroport à Bâle) (customs-free road) was constructed, allowing access from Basel to the departure terminal without passing through French border controls.[citation needed] The first enlargement project was approved by referendum in Basel in 1960 and, over the following decades, the terminals and runways were continually extended.Following the Swissair liquidation in 2001, the subsequent ending of services in early 2002, and the transformation of Crossair into Swiss International Air Lines, the number of flights from Basel fell and the new terminal was initially underused.[citation needed] In 2004 the low-cost carrier easyJet opened a base at Basel and the passenger totals rose again, reaching 4 million in 2006.[17] In December 2014, Swiss International Air Lines announced it would cease all operations at Basel by 31 May 2015 due to heavy competition from low-cost carriers.[19] In January 2017, the removal of Basel/Mulhouse from Air Berlin and its Swiss subsidiary Belair's route networks was announced.The following airlines offer regular scheduled and charter flights at the EuroAirport:[27] The airport is connected to motorway A3 which leads from Basel to the southeast of Switzerland passing Zürich.Plans to build a dedicated airport rail link have existed for some time, however political delays have pushed the earliest operating date to 2035.the tramway serves St Louis SNCF Station, where one can change for the shuttle bus to the airport.