* 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, 45 degrees is a trigger point for the algorithms
so a 44.5 degree angles will behave very differently than a 45.5 degree angle. Since most of us will no have a protractor handy every time we are editing, it is best to just 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.