Lyft is rapidly expanding the number of US cities it operates in this year. The ride-hailing company plans to launch in 100 new US cities by the end of 2017, bringing the total number of cities it serves to 300, Jaime Raczka, the head of early stage markets and expansion at Lyft, told Business Insider. The company isn’t waiting to grow its market, either. Lyft will roll out service in 40 of the 100 cities