Signal Tool

Signal Tool button

The Signal Tool is used to configure junction signalization and signal traffic phases.

A junction's signalization can be static (not changing, for example, controlled by stop signs) or dynamic (controlled by dynamic traffic signals). The signalization of a junction is defined using phases. A phase indicates which signals are active and the state of the maneuver roads (for example, whether traffic may enter the junction along a given maneuver road).

Each phase is composed of several intervals. An interval is a period in a junction that corresponds to allowed movements. Typically, there are three intervals in a phase: green, yellow, and red.

The Signal Tool provides several autosignalization operations for automatically applying signalization templates to a junction. These operations can also automatically place Prop Assembly Assets and Signal Assets.

Signal assets are linked to junctions by associating them to maneuver roads. This association can be performed manually, but an automatic detection operation can attempt to identify nearby signals and compute associations. A single signal asset can be associated with maneuver roads in multiple separate junctions.

Autosignalize a Junction

RoadRunner provides an autosignalization feature that can be used to apply common signalization templates to an intersection. For example, use these steps to quickly configure a four-way stop, a signalized intersection with protected left turns, and so on:

  1. Click the Signal Tool button.

  2. Select a junction.

  3. Click the Auto Signalize button in the Attributes Panel.

  4. Select a signalization template from the Auto Signalize Junction dialog box, and then click Signalize.

Tip

If a prop or assembly is selected in the Library Browser first, select Automatically Place Selected Prop to automatically place the prop and connect any signals to the junction.

Add an Empty Phase

  1. Click the Signal Tool button.

  2. Select a junction.

  3. Right-click beyond the end of the phases in the 2D Edit Window.

Alternatively, right-click an existing phase to duplicate it.

Clear All Phases

  1. Click the Signal Tool button.

  2. Select a junction.

  3. Press the Delete key or select Edit > Delete from the Menu Bar.

Specify a Maneuver Road's State in a Phase

To control the traffic state of a maneuver road in a given signal phase, follow these steps:

  1. Click the Signal Tool button.

  2. Select a junction.

  3. Select the desired phase in the 2D Edit Window.

  4. Select the maneuver road whose state you want to change.

  5. Choose a State in the Attributes Panel.

Specify a Signal State in a Phase

To control a traffic signal's bulb states in each interval of a given signal phase, follow these steps:

  1. Click the Signal Tool button.

  2. Select a junction.

  3. Select a gate. Gates appear as lavender bars on maneuver roads.

  4. Select a signal you want to disassociate.

  5. Choose a signal state for each interval in the States group of the Attributes Panel.

Note

If no States group appears, then the selected signal is not associated with any maneuver road gates in this junction. Refer to the Associate a Signal with a Maneuver Road Gate section.

Edit a Phase Duration

To change the duration of each interval in a signal phase, follow these steps:

  1. Click the Signal Tool button.

  2. Select a junction.

  3. Select the desired phase in the 2D Edit Window.

  4. Change the Interval Time in the Attributes Panel.

Change the Current Phase

  1. Click the Signal Tool button.

  2. Select a junction.

  3. Select the desired phase in the 2D Edit Window.

Alternatively, click the phase arrow buttons in the 2D Edit Window.

Tip

You can scrub through the signal phases by dragging the timeline bar in the 2D Edit Window:

Associate a Signal with a Maneuver Road Gate

To manually associate a maneuver road with one or more Signal Assets, follow these steps.

Note

In many cases, the Auto Detect Signals operation (see next section) works sufficiently. Try that operation first.

  1. Click the Signal Tool button.

  2. Select a junction.

  3. Select a gate. Gates appear as lavender bars on a maneuver road.

    Note

    Multiple gates might overlap. Cycle-Select to choose which gate to edit.

  4. Right-click the signal you want to associate the maneuver with.

    Note

    You cannot associate to signals in a prop assembly. You must first expand the assembly.

Alternatively:

  1. Click the Signal Tool button.

  2. Select a junction.

  3. Select a gate. Gates appear as lavender bars on a maneuver road.

  4. Select a signal.

  5. Click Add to gate in the Attributes Panel.

Automatically Associate Signals with Maneuver Road Gates

This operation locates signals surrounding an intersection and attempts to automatically associate signals with maneuver road gates.

  1. Click the Signal Tool button.

  2. Select a junction.

  3. Click the Auto Detect Signals button in the Attributes Panel. At least one phase must be present in the junction.

This operation uses the maneuver road turn types when determining which signals to associate with. If a maneuver road is being associated to an inappropriate signal, verify that the maneuver road's turn type is correct using the Maneuver Tool.

Note

Automatic detection does not work for signals in a prop assembly. You must first expand the assembly.

Remove a Signal Association from a Maneuver Road Gate

  1. Click the Signal Tool button.

  2. Select a junction.

  3. Select a gate. Gates appear as lavender bars on a maneuver road.

  4. Select a signal you want to disassociate.

  5. Click Remove from gate in the Attributes Panel.

Tips on Signals

  • If the signals do not automatically detect the correct states, choose the phase, click the signal, and set the desired states. Properly setting the Supported Turn Types for the signal can result in better automatic choices.

  • Before autosignalizing to automatically place signals, create a traffic light assembly and select it in the Library Browser.