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Roundabouts, rotaries, or traffic circles, are unique segments of roadway in the Waze router. When a driver approaches a roundabout, a specific icon is displayed in the turn direction area of the display with a number corresponding to the exit count from the driver's entry into the roundabout.
Only traffic circles with the D01 traffic sign should be mapped as roundabout. Other traffic circles should be mapped with separate curved segments or just as crossing.
If you want to add a roundabout, you firstly draw the roads as a normal crossroad, but don't connect the roads/segments. Secondly you draw the roundabout and WME will connect the crossing roads automatically. Extended information can be found in the USA wiki on the: Roundabouts/USA page.
- Add a City name and, if there are addresses linked to the roundabout, a Street name. Otherwise, leave the Street name empty.
- If a roundabout has his own name a Junction / interchange area place can be created.
- A roundabout always get as road type the type of the most important passing through road.
- Enter as Speed limit the highest maximum speed of the connected segments.
- A dead-end street (cul de sac) should not have a roundabout at the end.
- If there is no road sign for a roundabout don't use a roundabout.
- Don't connect more than one road to a roundabout node. Each connected road should have its own connection to the roundabout.
- Don't create connected roads within a roundabout. This lead to weird instructions like "take exit zero".
- LARGAS refers to a special type roundabout.
- For moving a complete roundabout the WME RA util script can be used.
Junction boxes can be used over roundabouts, covering them either partially or fully. In addition to providing better timing, using a junction box on a roundabout can accomplish these goals:
- As mentioned above, they may be used to correct routing problems.
- They may be used to provide customized turn instructions where signage for a particular exit is different when coming from different entrances.
- They may also be used to override the default navigation instructions.
- For example, divided roads may meet at a small roundabout, where drivers would expect normal instructions based on signs, lane markings and what's common in the region. Rather than using unnatural geometry to force the normal instructions, draw a junction box to encircle the roundabout and set the voice prompt for each path through the roundabout to Turn left, Turn right, U-turn or Continue.
- Conversely, where non-normal instructions are desired that would otherwise be normal, make a junction box voice prompt of Let Waze count the exit number.
- Where small traffic-calming circles have been mapped as roundabouts, a junction box may be used to suppress unnecessary "at the roundabout, continue straight" instructions. Check with local leadership on how to handle traffic-calming circles.
If the junction box completely contains only nodes on the roundabout, its voice prompts will produce the proper roundabout spoken and visual instructions, such as "at the roundabout, turn right" and "at the roundabout, take the fourth exit". Normal and non-normal instructions can be used in the same roundabout. If nodes outside the roundabout are included in the junction box, the navigation instructions will not work as expected, so be sure to only include roundabout segments when using a junction box to control roundabout instructions.
This paragraph was copied from the USA wiki.