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Junction Style Guide

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=== Map editing 101 ===
Although it is highly recommended to read the [[editing manual]] before touching the map, it is required that you do not continue with this guide until you have read the following:
* [[Map_Editing_QuickMap Editing Quick-start_Guidestart Guide|Map Editing Quick-start Guide]]* [[Creating_and_Editing_street_segmentsCreating and editing road segments#Junctions|Moving and removing junctions]]
=== Junction definition ===
| [[Image:junction_unsaved.png|50px|border]]
The [[Glossary#Junction_or_Junction_PointJunction or Junction Point|Glossary on Junctions]] provides details on how junctions can appear differently in the editor depending on its state or condition.
A junction is made up of three things:
# Two or more road [[Creating_and_Editing_street_segmentsCreating and editing road segments|segments]]
# One point where all the segments meet (the [[junction point]] itself)
# [[Map_Editing_QuickMap Editing Quick-start_Guidestart Guide#Turn_restrictions_Turn restrictions .28allowed_turns28allowed turns.29|Turns allowed or restricted]] when traveling from one segment to another through that junction point
* The road types.
Review the article [[Junction_Style_GuideJunction Style Guide/Controlling_turn_instructionsControlling turn instructions|controlling turn instructions]] for a complete understanding of the requirements and issues surrounding this topic.
== Surface Streets ==
This final junction indicator must be located near the end of the road, but it should be located where there is still pavement as not to negatively impact client routes. Waze only considers the road fully traversed if both ends of the segment are fully crossed. If the junction indicator at the end of the segment happens to be at the edge of the pavement (or off of the road surface if aerials are not exactly aligned), it will be very difficult for a driver to cross that junction. A good rule of thumb is to have the end of the segment the same distance from the end of the pavement as it is from each side of the road.
With such a placement, the driver is given a chance to cross that junction indicator for that segment. Also check for the proper u-turn setting as covered in the [[Map_Editing_QuickMap Editing Quick-start_Guidestart Guide#U-Turns_at_the_end_of_deadTurns at the end of dead-end-streets|best practices article on u-turns]].
==== Cul-de-sacs ====
A Cul-de-sac (a.k.a. Court in the US) is a common treatment of a dead end street in a residential neighborhood.
In almost every situation, a cul-de-sac should be treated exactly as a dead end street, with the final junction indicator in the center of the bulb of the cul-de-sac. Be sure the free end of the final road segment has small blue dot displayed at the tip (when not editing or selecting the segment). If there is no blue dot, please correct it by following the steps for [[Creating_and_Editing_street_segmentsCreating and editing road segments#Fix_the_endFix the end-node_on_culnode on cul-de-sacs_and_deadsacs and dead-ends|fixing dead ends]].
There may be existing transition nodes on the map for other reasons like remaining after a connecting road is deleted, inherited from to the original base map import when rivers and streams created junctions, etc.
As long as you are '''certain''' it is not a valid transition node, a superfluous junction node may be [[Map_Editing_QuickMap Editing Quick-start_Guidestart Guide#Delete_a_JunctionDelete a Junction|deleted]]. Doing so will simplify the map, eliminate turn restrictions to maintain, and reduce computing resource needs. Also consider removing the [[Creating_and_Editing_street_segmentsCreating and editing road segments#Adjusting_road_geometry_Adjusting road geometry .28nodes.29|geometry node]] which will replace the junction node you delete, if that geometry node is not needed.
=== Roads to Nowhere ===
Since we want to avoid very short segments of road (the GPS chips in consumer devices can be very inaccurate which may make it seem that a driver skipped right over a short segment. This will result in [[Map_Problems_in_Waze_Map_EditorMap Problems in Waze Map Editor|automated map errors]] and possible route recalculations in the client,) it may be wise to shift the side roads as far apart from each other as possible with them still in the proper location (along the far curb lines for a residential street for example). This will maximize the length of the short segment between the side roads.
[[Category:Style Guides]]
[[Category:Table examples]]