Subway map, price & working hours. The Busan Subway features 4 subway lines, suburban railway line and the Busan–Gimhae Light Rail Transit line. There are 149 subway stations. Each line is numbered and colored: Line 1 (orange), Line 2 (green), Line 3 (brown), Line 4 (light-blue), Line BGL (violet), Line Donghae (blue).