Move the cursor to the center of the actual roundabout. The cursor will be a crosshair + to indicate that it is in roundabout creation mode. Click once at the center and then move the mouse any direction towards the perimeter of the roundabout. An orange circle will grow and shrink as you move the mouse, with the numbers in the center of the circle displaying the radius of the resulting roundabout.

Oftentimes roundabouts are completed before aerial imagery is updated. In these cases, enable the GPS tracks layer in the map editor by pressing Shift+G, and use the tracks to guide your preparations. If the roads approaching the roundabout meet the criteria for dividing roads, make the roads divided where they will connect to the roundabout. Note that where road changes do not match aerial imagery, leaving a map comment is advised.

Where bypasses have been built to allow right-turning or straight traffic to avoid the roundabout altogether, Waze might send traffic through the roundabout anyway. This is often confusing to drivers when it is contrary to regulatory or informative signs. In these cases, use a junction box to restrict the invalid route through the roundabout, which will force the bypass to be routed.

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The roundabout angle is the angle of any segment connected to the roundabout from the perspective of the origin. This is basically the same as the central angle of a circle. The actual turn angle of the segments is irrelevant.To explain;

In general when there is a clear roundabout in imagery, it is best to have it mapped as a roundabout in the road layer. There are a few cases that should not be mapped as roundabouts.

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At least one segment must intersect the roundabout when it is being created; otherwise, nothing will happen. To avoid problems with loops, it is best to make the roundabout intersect segments in at least three places.

If the road segments approaching a roundabout do not meet the criteria for dividing roads, they are generally drawn as simple two-way roads connected perpendicular (90 degrees) to the roundabout circle itself. If they do meet the criteria for dividing, each entry or exit segment should be connected to its own node on the roundabout, and the segments should be drawn in a way that fits with the natural flow of traffic. This will almost always cause the roundabout instructions to be non-normal. Due to historical reasons, some regions of the USA have a preponderance of normal or non-normal roundabouts, and the users in those regions are accustomed to one or the other set of instructions. Check with your regional leadership to determine which instructions are preferred when drawing roundabouts.

Do not connect more than one exit (either two-way segments or outgoing one-way segments) to the same node at a roundabout, as this causes Waze not to number any exit. In these cases Waze will show an empty circle for the roundabout instruction and will truncate the spoken instruction to "at the roundabout."

Waze supports two different styles of roundabout navigation instructions. One style instructs simply to turn or continue at the roundabout, while the other instructs how many exits one must pass before leaving the roundabout. The US editing community terms these two instruction styles as "normal" and "non-normal" respectively. The term "normal" is used here in its mathematical sense to mean "orthogonal", "perpendicular", or "at right angles".

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This section will explain the difference between normal and non-normal roundabout instructions. Normal roundabout instructions:

Note that roundabouts cannot be created over a maximum of 100 m (328 feet) in radius because of the danger that erasing all roads in the center could accidentally wipe out an entire city of roads. If a larger radius is required, create the roundabout at the maximum size allowed by the creation tool, then manually adjust its geometry to make it bigger.

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First, move the junction to the center of the roundabout. Click and drag the junction to where it should be. We also need to adjust the incoming segments so that they align with the roads leading into the roundabout. When roundabouts are built at existing intersections, the approaching segments are usually realigned for drivers to reach optimal speeds when entering and exiting the roundabout and/or to allow the roundabout to be placed at appropriate distances from existing structures. If roads have been added, removed or reconfigured in other ways near the roundabout, make these changes now.

All exits must be within the normal range with respect to a given entrance in order to generate "turn left", "turn right", "continue straight" or "make a U-turn" instructions from this entrance.

Let's assume this roundabout has a radius of less than 25 meters, so the other criteria are met for normal instructions.

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Some roundabouts are designed with physically separated bypass roads or at-grade connectors (AGCs). In many cases, roundabout bypasses can be mapped just like any other, but some roundabouts with bypasses have persistent routing problems.

Once all preparations are made, hover the cursor over the Roads icon on the toolbar and click Roundabout. You can also use the keyboard shortcut O.

Draw all of the road segments that will lead to the roundabout and ensure they extend into the center of the roundabout area. Use the visual map to align the roads. From there, create the roundabout just as described in the section above.

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Do not connect an entry belonging to one road to or past an exit belonging to the next road to the right, as this causes the first exit not to be counted and the subsequent exits to be numbered incorrectly. Even if the movement into and out of the roundabout is prohibited at this point (often the case in roundabouts with bypasses), if it is physically possible, users will tend to count it as the first exit, and we need to provide a consistent experience when mapping.

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Before junction boxes were developed to work with roundabouts, various hacks were used to force bypass routing. Some involved connecting the entrance of one road at or past the exit of the next road, in order to prevent the redundant turn through the roundabout and force routing through the bypass. Others involved the activation of penalties on the redundant turn to force routing through the bypass. None of these should be used.

When adjusting roundabouts, drag the junction nodes and move/delete the geometry points of the segments. This is better than disconnecting and reconnecting, because disconnection results in the loss of turn data. The script WME RA Util makes adjustment of roundabouts much easier.

It is common to have multiple road types meeting at a roundabout. For proper routing and consistent appearance, the correct road type must be assigned to the roundabout itself. The road types of interest in are, in order from highest to lowest,  Freeway ,  Major Highway ,  Minor Highway ,  Primary Street ,  Street ,  Parking Lot Road , and  Private Road . Since a roundabout is not a limited-access interchange, two freeways should never meet at a roundabout; however, it is conceivable that a freeway might begin or end at one.

It is usually inappropriate to join two segments at the same node on a roundabout and tends to cause problems. If both segments are one way in opposing directions, and the exit is to the left of the entrance, such as with both roadways of a divided highway, these will be treated correctly like a single two-way segment in navigation instructions. However, this geometry results in sharp turns that rarely fit the natural flow of traffic turning into and out of the roundabout, and it is often better simply to join each one-way segment at its own node on a roundabout.

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Click once when satisfied with the size and shape of the roundabout, which will create new 1-way segments in between each road segment contacted by the edge of the orange circle. Each approaching segment is disconnected from the junction in the center and reconnected to the roundabout with allowed turns already set, but with some turns unconfirmed. Make sure that each turn is confirmed.

Roundabouts, rotaries, or traffic circles, are unique segments of roadway in the Waze routing system. 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 or with a symbol of the movement through the roundabout. Manually creating a circular road will not produce these instructions.

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Like all new roads, each roundabout segment needs the country, state and city filled in. Please see the updating details to confirm the road section for details on this process. If the roundabout doesn't have a name, which is usually the case, click the None box next to Street. If the roundabout is a named circle on local signs, its segments can be named just like any other road. This is particularly important if addresses are on the roundabout.To determine the road type, see the road type section below. To determine the speed limit, if applicable, see the speed limits section on roundabouts. When the process is complete, all other attributes have been set, and the edits are saved, this is how the new roundabout looks:

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:

Since the angles of the segments approaching the nodes do not matter, both of these layouts will give the same instructions. Only the angles between the nodes and the center of the roundabout (roundabout angles) determine which instructions are given.

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.

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If an oval or elliptical roundabout is required, hold down the Shift key during roundabout creation. At this time only oval roundabouts along the north/south or east/west axis can be created. If an alternate shape or axis is desired, create a circular roundabout that is close to the correct shape and adjust the geometry handles manually.

A roundabout can be both normal and non-normal at the same time depending on your entry node, because the roundabout angle is calculated from where one enters the roundabout.