A simulation of a NYC Transit Authority train traveling by automatic signals with working stop arms. Working circuit drawings show how the signal system relays function while the train passes over track circuits. Good learning tool. Real photos used in the program design. BREAKTRU AUTOSIM is licensed as freeware, full size of the download is 2.92 MB. You can download a free version of BREAKTRU AUTOSIM by following download link at Free Downloads section of this page. BREAKTRU AUTOSIM is developed or distributed by BREAKTRU SOFTWARE and is listed under family.