Cheapie Systems

TrafficNeXt 3 Traffic Light Control System

Version 3.3

Installation and Operation Manual

Revision 2


Thank you for choosing the TrafficNeXt 3 control system! These instructions will help you to install, configure, and operate your new traffic light controller. Please read them completely and save them for later reference in order to get the most from the system.

You Will Need


First, build a 3x3 panel of digimese. Place the 5 digilines buttons on this panel in a + shape. Set all of them to the "button" channel. As for messages, the left one should send the message "left", the top one "up", the right one "right", the bottom one "down", and the center one "enter". These are also the functions of the buttons, and you may place a sign reminding yourself of this if desired.

Next, connect an LCD. It can be placed on the digimese panel (recommended), or off to the side connected via digilines or poles. It must be set to channel "lcd".

Now, it's time to focus on the road. In each location where a pole is desired, dig to 2 meters below road level. In the hole, place a digilines distributor, then any node (such as concrete or steel block) on top. Connect the distributors together with digilines, then build the poles however desired on top.

At this point, decide how to label the approaches. "a" and "c" form a set of opposing approaches, while "b" and "d" form another set. "a" and/or "c" should be on the street with more traffic, as it will rest on green on those two. It is often not necessary to use all four. If left turn signals will be added, they use the same name but with a "t" suffix. For example, a left turn signal on approach A (which uses channel "a") should be set to channel "at". Pedestrian signals use a "p" suffix. For example, a crosswalk across approach C would have the lights on channel "cp". Finally, "be prepared to stop when flashing" advance warning beacons use a suffix of "b".

On each pole, place traffic lights as desired. Make sure that they are on the proper channels as explained earlier.

At this point, place a digilines player detector under each minor street approach, as well as under each left turn lane that will use protected left turns. It can be located anywhere from 1-10m (4m recommended for straight, 2m for left turn) behind the stop line and set the channel to "detector_channel" (for example, a left turn detector on approach B gets channel "detector_bt") and set the radius to the distance to the stop line.

If crosswalk(s) are desired, place digilines buttons and traffic lights on poles in appropriate locations for the crosswalk(s). The crosswalk(s) crossing approaches A and/or C (if present) is considered the "main" crosswalk, and the buttons should have channel "pedbutton" and message "main". Any crosswalks crossing approaches B or D are "side" crosswalks and should have buttons on channel "pedbutton" with the message "side".

Finally, connect the distributors, detectors, digimese panel, and a Luacontroller together with digilines, and program the Luacontroller. There will be a brief delay while internal data is set up, and then text should appear on the LCD.


The following should be displayed on the LCD when the controller is first powered on:

Priv Lvl: U
Exit Menu

When in the menu system (as it is now) the first line of the display shows either a submenu name (if currently in a submenu) or your current privilege level if you are not in a submenu. The following lines show the currently selected menu item as well as its value if applicable.

At the moment, you are at privilege level U (meaning you're not logged in) and the "Exit Menu" option is selected. From here, up/down will change values or pages when applicable, left/right will scroll through the menu options, and enter will perform an action if there is one.

The following options are available in this menu:

After entering the correct passcode, privilege level A will be entered and the available options change. They now consist of the following:

The Hardware Setup menu contains the following options:

The Times and Durations menu contains the following options:

The Options menu contains the following options:

The Phase Lock menu contains the following options:

The System Setup menu contains the following options:

While the controller is in operation, there is a limited menu accessible with the left/right buttons. In addition to the version display, the following items are available:


While not in a menu, the controller runs in normal operation mode. Within this mode, it can be in either a "Run" state, in which case it is sending a timed sequence of signals, or "Idle", in which case it is waiting for an event such as a detector being triggered.

When the controller is idle, signals on "detector_b" or "detector_d" will start a cycle for through traffic on the minor street. "detector_at" (as well as other left turn detectors) will start a left turn cycle on the appropriate approach if protected left turn is enabled. The pedestrian buttons will start the corresponding pedestrian cycle as well.

When the controller is running, pedestrian buttons will be "remembered" in the queue and handled immediately once the controller is idle again. Vehicle detectors are ignored in this state.