Dear Vincent,
Thank you for your message. If you couldn’t delete the road segment it is probably “high precision” indeed. There is a small button on the bottom right corner, which allows you to mark protected roads, so you can see it easily. Of course when the change involves these types of roads, we surely already have this information from our sources. Should you have any questions, please don’t hesitate to ask and you are also welcome to join our Facebook group: https://www.facebook.com/groups/mapcreatorbenelux/. Greetings, Alicja
