The Czech SOR brand electric buses on the regular BB1 and BB2 routes in Prague’s BB Centrum have transported more than one million passengers. The lines connect BB Centrum and the Budějovická metro station and the electric buses have travelled almost 70 thousand kilometres since February 2016. The operation of the electric buses in Prague’s mass transit system is a joint project of the development and investment company PASSERINVEST GROUP, the ČEZ Group and the ARRIVA transportation company, which aims at contributing to an improved environment and lower traffic noise in BB Centrum and its environs.