File:BSicon exBUE-us.svgMUTCD 4 Track Railroad Crossing Signs.svg, and the line segment is from BSicon STR.svg (cc-by-sa-3) Author Tve4 SVG development InfoField The SVG code
File:BSicon BUE-us.svgis from PD image MUTCD 4 Track Railroad Crossing Signs.svg, and the line segment is from BSicon STR.svg (cc-by-sa-3) Author Tve4 SVG development InfoField
File:BSicon uBUE-us.svgfrom PD image MUTCD 4 Track Railroad Crossing Signs.svg, and the line segment is from BSicon STR.svg (cc-by-sa-3). Author Lexlexlex SVG development InfoField
File:BSicon uexBUE-us.svgfrom PD image MUTCD 4 Track Railroad Crossing Signs.svg, and the line segment is from BSicon STR.svg (cc-by-sa-3) Author Lexlexlex SVG development InfoField