Busan Subway Line 3 3호선 is a line of the Busan Subway system. The line was built from 1997 to 2005 and opened on November 28, 2005. The line is 18.3 kilometers long, and has 17 stations. Each train of the line has 4 cars. Line 3's trains do not have walls at the extremes of the inner cars (just like Line 4), giving an unblocked view of the whole train from one end to the other.