Atlas HO scale signal systems have been known for their quality and performance. If you’re a serious train hobbyist or just a beginner, HO scale signal systems are a great way to bring your train set to life. With an HO scale signal system, you get the real look as well as an advanced signal system. You can have each signal run by itself, or with other signals. Create three way and four signals that are synchronized when connected to each other. Our wide selection includes double target, bi-directional, and single signals. Buy multiple signals at once and save even more on your purchase! Atlas signal systems are always reliable and realistic.