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=== Loops ===
#REDIRECT [[Junction_Style_Guide#Loops]]
<gallery mode=packed-hover>
File:U-shaped Road.jpg|U-shaped road
File:Jct loop bulb.png|terminal or dead-end loop
Image:Jct_roundabout.png|roundabout or traffic circle
</gallery>
Road segments form a loop when you can trace a path from a starting point around to the same point without retracing any portion of the traced path.
 
==== Every loop must be made up of three or more segments ====
[[File:Loop_3-part_6.jpg|right]]Any loop that does not follow this rule can cause problems for the Waze routing server. If there is no side-street, you must [[Map Editing Quick-start Guide#Splitting a segment|insert an extra junction node]] along the loop. Many new editors will see the extra junction node(s), assume they are not needed, and delete them. One way to prevent this is to add a driveway to the loop.  Another solution is to educate new editors.
=====One-segment or dead-end loops=====
[[File:Dead end loop.png|thumb|right]] One-segment, self-connected, or dead-end loops are often found in basemap areas. It is difficult for Waze editors to create one-segment loops.
 
=====Two-segment loops=====
Two-segment loops are also known as "same endpoint drivable segments" or "same ..."  They can cause a a problem for the Waze app because the routing server gives your mobile app a list of node ids, but the app needs to tell you which segments to drive on.  If there are two ways to get from one node  to the next without going through any other nodes, then the Waze app might just have to guess.  It might guess a detour off the highway through a gas station or scenic overlook.  Please save Waze from this silliness.  Correct two-segment loops.
 
==== Loop save errors ====
The Waze Map Editor may be resistant in editing a loop that does not already follow the rule that it must be broken in two. If you run into saving errors, try one of the following approaches.
 
If the loop and the road leading to it have the '''same''' name:
 
#Select the loop and the road
#Click the bridge icon that appears (one end of the loop will disconnect from the other)
#Move the now free end of the loop so it is slightly separated
#Save
#Cut the loop
#Reconnect the disconnected end of the loop
#Confirm turns
 
If the loop and the road leading to it have '''different''' names:
 
#Draw a new road segment that connect to the loop/road junction
#Give that new road the same exact name as the loop
#Select the loop and the new road segment
#Click the bridge icon that appears (one end of the loop will disconnect from the other)
#Move the now free end of the loop so it is slightly separated
#Save
#Cut the loop
#Reconnect the disconnected end of the loop
#Confirm turns
 
Here is a [http://www.youtube.com/watch?v=a7yAzG7HElw video on YouTube showing the second method].

Latest revision as of 01:06, 27 November 2017

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