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Introduction

This section deals with the creation of a virtual single carriageway with bidirectional lanes.

Contents

Single Carriageways

In the example below, there is a single carriageway for left-hand traffic travelling in different directions:

Drawing a Carriageway

First, you will need to plot your carriageway. Please follow the guidance for drawing a carriageway here.

Carriageway Configuration

Once your initial carriageway is plotted, return to the Create and Draw New Carriageway window. Now you can configure the carriageway and its Rules.

1. For a single carriageway with a right-hand and a left-hand lane, as in the example below, enter 2:

2. Select Bidirectional Lanes, and an option for Reversed Lanes is now available for Lanes 1 and 2.

3. For left-hand traffic, select the Reversed Lanes option for lane 2. For right-hand traffic, select the Reverse Lanes option for lane 1.

4. Return to the PPI and ensure that the carriageway follows the route correctly. Please refer to the notes regarding plotting a carriageway here.

5. Complete the Create and Draw New Carriageway Wizard (information regarding the other Rules cane be found here) and Save.

In the example below you can see the new carriageway with two lanes; with arrows in orange showing the direction of the traffic:

Once the carriageway has been configured, the Reverse Direction setting can be seen in the Carriageway Settings:

And here for the other lane:

Please note that when the system has saved the configuration, Lanes 1 becomes Lane: 0, and Lanes 2 becomes Lane: 1.

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