My name is Abhishek and I'm a mapper on the OSM team at Lyft.
Apologies for the delayed response. I understand your concern regarding the through value. Based on the road geometry, there is only one maneuver possible here. We apply turn lanes tags based on signs and markings. In this case, the value was assigned according to the street view imagery dated June, 2025 https://drive.google.com/file/d/1axdUzHFIkwuqsEANip8Izmk0IHCEVdgP/view?usp=sharing. However, my edits here are incorrect as the value “left|left;through” should be accompanied by a “turn:lanes” tag, not a “turn” tag. Thank you for bringing this to my attention. According to our approach, roads with two or more lanes should be tagged with a “turn:lanes” tag. Perhaps a more appropriate value here would be “left|left” or “left|”.

Best regards, Abhishek