The METRO Blue Line light-rail (also known as the Hiawatha Light Rail line) corridor meets Lake Street at Hiawatha Avenue, and has been another reason for investment in the area. The station itself is one of the most expensive along the line because it had to be elevated above a busy intersection. Furthermore, the Lake Street station has become one of the most crime-ridden stops along the Blue Line. Beginning in August 2012, police have increased patrols, added 24 new high definition cameras, and even added classical music in an effort to deter troublemakers. Lake Street has undergone a major upgrade, its first in half a century. Some have proposed adding light rail to Lake Street since it is a major bus corridor (streetcar service previously existed until the 1950s). Others have suggested adding a streetcar line either to Lake Street or to the Midtown Greenway about a block to the north, a former freight rail bed that has been converted into a pedestrian and bicycle path.