Model railroaders who want to ballast their tracks individually will turn to the Roco-Line track without embankment. Roco has a simple labeling system for the tracks. All tracks marked with "G" are multiples or parts of a straight track measuring 320 in length. Tracks labeled "R" represent different radii. The distance from the center of the rail to the center of the rail of the radius that is "1" larger is 61.6.