The issue is not necessarily *where* you decided to add turn lanes. Unless aerial imagery is out of date, there are turn lanes here, you just tagged the lane information incorrectly.

The westernmost way added in this edit should have been given the tags lanes=5 and turn:lanes:backward=left|none|none, but the only lane information given to this way was lanes=4, which is wrong. This way also should have started exactly where the turn lane became available, not as far back as it does here. You added a way in the middle tagged with lanes=6, lanes:forward=3, and lanes:backward=3 which should have been tagged as lanes=5, lanes:forward=2, lanes:backward=2, and lanes:both_ways=1. The easternmost road segment was the only way in this edit that was tagged correctly.