I have been using a data source of zebra crossings detected from the air, to check and improve zebra mapping. The number of false positives and false negatives is very high. Also, the matching of detected zebra crossings to existing crossings is good, but not excellent. The all-in error rate is much too high for an automated import/conflation; it would cause an enormous amount of checking and correcting afterwards.
I sincerely hope that this tool is better and does not introduce more errors than it solves!