The history of the Los Angeles Metro Rail and Busway system begins in the early 1970s, when the traffic-choked region began planning a rapid transit system. The first dedicated busway opened along the 10 freeway in 1973, and the region's first light rail line, the Blue Line (now the A Line) opened in 1990. Today the system includes over 160 miles (260 km) of heavy rail, light rail, and bus rapid transit lines, with multiple new lines under construction as of 2019.