HO Code 100 with black ties and nickel silver rail. Precisely engineered angles of intersection to solve most crossing requirements. For double crossovers use the 25 degree crossing with #4 Custom-Line Mark 3 Turnouts. A wide variety of track arrangements appear in Atlas layout instruction books.
A true classic, Atlas Code 100 track features black plastic ties and nickel silver rail and offers great performance and a wide selection of pieces to choose from.