From Wazeopedia
{{@|Allowing median U-turns}}
* To allow a U-turn from only one direction, first set up U-turn prevention for both directions. Break condition #3 on the side where U-turns are allowed. Increase or decrease the angles so that the in and out segments (A and C) are [[#Checking for parallel segments|not parallel]]. A [[Glossary#mDL|micro-dogleg]] can be used to change the angle without changing the appearance of segment.
[[File:U-turn selective Uturn prevention.png|center]]
==== {{@|Checking for parallel incoming and outgoing segments}} ====