NXSYS, Signalling and Interlocking Simulator - nycsubway.org

NXSYS, Signalling and Interlocking Simulator

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NXSYS, Signalling and Interlocking Simulator

NXSYS Interlocking Simulator screenshot.

Contents

1 NXSYS

2 Downloads and Documentation

2.1 New!!! Introduction to NXSYS Video

2.2 New!!! NXSYS (v2) sources for MacOS on Github

3 Legal Disclaimer

4 Page Credits

NXSYS

Please note! Downloads and documentation of NXSYS, now much improved, are now available on the developer's web site. Available for Windows 10 and MacOS. Click here.

NXSYS, New York City Subway Signalling and Interlocking Simulator, A tool and toy and labor of love by Bernard S. Greenberg.

NXSYS is an application that recreates for you the experience of controlling switches, signals, and trains in the New York City Subway system. Rather than conventional menus and toolbars, NXSYS<br>presents to you the exact same user interface as so-called "Entrance-Exit" "pushbutton interlockings" present to New York City subway towerpersons, except that instead of pressing buttons with your finger, you click with the mouse. And instead of commanding real trains full of people, NXSYS simulates them cybernetically. You see the same display, get the same options and responses, must learn the same skills, and may enjoy the same pleasures as a towerperson at an "entrance-exit" interlocking.

There is no more comprehensive, detailed information source on New York Subway Signalling publicly available, or perhaps even to insiders. This is THE way to learn about New York City Subway<br>signalling. And it's for free, fun, interactive, extensible, and assumes no prior knowledge. (If you wish to learn about NY City signalling right now on the web, and aren't interested in trying NXSYS, please visit<br>Subway Signals: A Complete Guide , written by the author of this program and its documentation.)

The trains and tracks are imaginary, but the control panel, the extensive relay logic circuitry, and the real-time behavior and interaction of you and the imaginary trains and tracks are not. You press buttons and establish and cancel routings, control signals and switches, and interact with moving trains. You are limited by the circuitry to safe moves -- you are prevented from sending trains crashing at each other, setting routes that conflict with each other, moving switches while trains are on them, or executing any other invalid or dangerous action. Learning to control the switches and signals under these constraints is by no means trivial, and this is<br>wherein the fun of NXSYS lies. NXSYS is supplied with two sample interlockings, a (fairly complex) 4-track layout, and a full-spec detailed three-track layout, an automatic demo that shows you what to do and comments on it, and a comprehensive help file that explains not only all the functions of the program and supplied interlockings, but all of the railroad signalling, switching, and New York-specific concepts involved.

NXSYS actually simulates relay wiring and logic designed according to New York City Transit Authority models and standards that have changed little in forty years. For the electrically-inclined, NXSYS allows the actual relay circuits to be shown in standard NYCTA notation, printed out en<br>masse to a system printer, and actually observed in operation! Information is available for designing your own layouts. Not insignificantly, NXSYS can also be used as a powerful tool for interactive relay-logic design and simulation.

NXSYS can be viewed, utilized, or enjoyed at any of four levels:

An entertaining rapid-transit video game for those who love the subways and wish to recreate the experience of navigating the tracks, and learn more about the subways and their signals.

A comprehensive, interactive learning tool for the operation of rapid transit signalling and NX/UR control towers sufficiently detailed and accurate to be of value to those actually responsible for operating such equipment.

A detailed guide to the sample implementation of such systems in electrical relay logic, observable in action down to the relay level.

An interactive computer-aided design (CAD) tool for designing and debugging your own interlockings and signal circuitry.

Downloads and Documentation

Please note! Downloads and documentation of NXSYS, now much improved, are now available on the developer's web site. Available for Windows 10 and MacOS. Click here.

New!!! Introduction to NXSYS Video

Introduction to NXSYS Video. Watch on YouTube.

New!!! NXSYS (v2) sources for MacOS on Github

NXSYS (v2) sources for MacOS on Github

Legal Disclaimer

Microsoft, Windows, Windows 95, Windows 98 Windows NT, Windows 2000, Win32, Win32s, and Visual Basic, are a trademarks of the Microsoft Corporation. Apple, Macintosh, Mac, and OS X are trademarks of Apple, Inc., registered in the US and other countries.<br>Pentium and Intel are trademarks of the Intel Corporation.

"NX" refers...