[altairprime]

The way to get that corrected is to ask the local police to ticket illegal turns at that intersection for a day, indicating that Google refuses to correct the issue and is directing hundreds of violations a day at the intersection. Google ignores unenforced road signs that are frequently ignored by their data providers (drivers), so enforcement complaints from drivers are necessary to force the correction.

[throwaway049]

Their other data providers are me, as a user submitting a correction, and Streetview, which they could use to confirm the turn restriction.