I don't know physically where there is an actual crossing and where there is not by the center median, as I don't have images to prove such a case. But you have told me that you have updated images and if they are of quality, you should be able to make out where the center median is cut or if there are turn arrows painted on the street.

That would be a great help in correcting the navigation, since as it currently stands, to cross from one direction to the other, you have to do several km and I guess this would not reflect reality.

e.g. https://www.openstreetmap.org/directions?engine=fossgis_osrm_car&route=-33.055688%2C-60.599502%3B-33.055454%2C-60.599492#map=16/-33.05774/-60.59423