Important secondary roads run to Altenburg (via Lumpzig), to Werdau (via Linda), to Wünschendorf, to Stadtroda and to Hermsdorf. As part of the Bundesgartenschau 2007, a new bypass road was built in the east to improve the connection of southern city parts to the A 4 and to relieve the city centre from transit traffic. The closest regional airports are the Leipzig/Halle Airport, about north and the Erfurt-Weimar Airport, about west of Gera. Both serve mainly holiday flights. The nearest major airports are the Frankfurt Airport, the Munich Airport and the prospective Berlin Brandenburg Airport. In the eastern part of Gera lies the airfield Gera-Leumnitz meant for private aviation. Cycling is becoming more popular since the construction of quality cycle tracks began in the 1990s. For tourists, there are the "Weiße Elster track" and the "Thuringian city string track (Radweg Thüringer Städtekette)". Both connect points of tourist interest, the first along the White Elster valley from the Elster Mountains at the Czech border to Saale river in Halle and second from Eisenach via Erfurt, Weimar, Jena and Gera to Altenburg. For inner city every-day traffic, some cycle lanes exist along several main streets. The Gera tram network was the second in Germany that launched electrical engines in 1892. Today, there are two long lines, one from Bieblach via city centre to Lusan (line 3) and another one – opened in 2006 – from Untermhaus via city centre to Zwötzen (line 1). The third short line is a connection between Lusan and the Zwötzen railway station (line 2). Another line is planned to connect Langenberg and the northern city parts. On line 3 is one course every 5 minutes, on line 1 every 10 minutes and on line 2 every 20 minutes. The bus network connects districts without trams as well as neighbouring municipalities that do not have a rail connection. Tertiary institutions are the private college "SRH Fachhochschule für Gesundheit Gera" (university of applied sciences for health) with 500 students and the "Berufsakademie Gera" (Cooperative education) with 700 students. Furthermore, there are four Gymnasiums, all of them are state-owned.