How to create a roundabout (obsolete)

Note: these instructions are for the older Cartouche editor, although the principals are the same. For the new Waze Map Editor, read the article for Creating and Editing a roundabout.

This information is obsolete and the active links to this page are being reviewed for disconnection or replacement.

Creating a roundabout with the old Cartouche editor

1. For each road connected to the roundabout, edit the road geometry so it enters the roundabout correctly, and then bring the end of the road to the centre of the roundabout. Use the aerial image to help.
2. Make sure the directionality of each road is correct; ie one-way and two-way roads are set correctly
3. Add a junction (with enable all turns checked) at the centre of the roundabout, where all the roads meet on the map
4. Click on that junction, and choose Turn into a Roundabout
5. Choose the size of the roundabout
   • Remember the size is the radius which is half of the diameter
   • If the aerial image is present, you can compare the black circle size to the actual image of the roundabout
   • If you change the roundabout size, click on Update display in the Edit Pane; to change the size of the black circle on the map
   • You can also change the roundabout size by clicking and dragging the small yellow circle at the right bottom right corner of the black circle. The size of the roundabout changes in the Edit Panel as you drag. You may need to increase the zoom level so you can click on a part of the circle that isn't under the boxed [1] that appears when you have selected [1] intersection
6. Choose Create roundabout from the Edit Panel

Note that if there are no roads inside the roundabout when you select the create roundabout option, nothing will happen. There must be at least one road crossing the circumference of the roundabout being created.

What is a normal roundabout? When will I get ‘turn right’ / ‘continue straight’ and when will I get ‘take the X exit’?

If a roundabout is normal, you will get ‘turn right / left’ or ‘continue straight’. If it’s not normal, you will get ‘take the X exit’.
What is a normal roundabout? It is one with up to 4 nodes, and a central node. All nodes are aligned within normal range of the entry point, when you imagine an X-Y axis which starts from the entrance point and through the middle node. So this means the same roundabout can count as ‘normal’ when coming from one node, and ‘not normal’ when coming from a different one. Some example will help explain this.

For the sake of simplicity, let’s look at a roundabout with three exits.

Each time you approach this roundabout (from one of the three nodes) an imaginary line is drawn from your entrance and through the central node.
The angle on the segment approaching the node does not matter for this calculation. It could be either one of the two, or anywhere in between.



Coming from node #1, this is how we see the roundabout:

Both exits 2 and 3 are within the normal range (90 +/- 30 and 180 +/- 30). In this case both of them will get an instruction to ‘turn right’ or ‘continue straight’

Coming from node #3, this is how we see the roundabout:

Both exits 1 and 2 are not within the ‘normal’ range – both will get a ‘take the X exit’. Note: even if one of these exits was within normal range, the roundabout itself will be ‘not normal’ and all exits will get the ‘take the X exit’ prompt. The entire roundabout must be normal.