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From Wazeopedia

Junction Style Guide

293 bytes added, 7 years ago
Geometry
* Between '''20 and 30''' degree departure angle = '''Keep''' (or Exit for Ramps)
These angles allow us to clearly depict the desired result (turn vs. keep) while staying within safe margins of the angles the actual algorithms use for decision making. For example, since 45 degrees is a trigger point for the algorithms so , a 44.5 degree angles angle will behave very differently than a 45.5 degree angle.  Similarly, if we have a [[#Y_Intersections|road split at a Y]] and we want to be clear about which is "straight" and which bears off to the side, having one branch at zero degrees and the other branch at 5 degrees isn't as clear and obvious as if it were zero degrees vs. 20 degrees. Since most of us will no have a protractor handy every time we are editing, it is best to just simply avoid situations where exactness would matter.
This knowledge allows us to control how a junction behaves by modifying a single geometry node in most cases. This is often useful for [[At-Grade_Connectors|At-Grade Connectors]] where sometimes we prefer a "Keep right/left" and other times a "Turn right/left" would be more appropriate.
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