This seems to suggest differently. https://www.azmirror.com/2019/07/08/arizona-police-agencies-gather-share-license-plate-data-but-few-ensure-rules-are-being-fo

This seems to suggest differently. https://www.azmirror.com/2019/07/08/arizona-police-agencies-gather-share-license-plate-data-but-few-ensure-rules-are-being-followed/ https://www.azmirror.com/2019/07/08/arizona-police-agencies-... Seems the US has many more installed in police cars (which is rare in the UK) vs stationary ones, in general.