So we're using driving instructions that a friend helpfully extracted for us from Israel's map-directions website. Part of the instructions look like this:
Turn sharp left onto khaniti, 1.09 km.
Turn right onto unnamed street, 40 meters
Turn right onto khaniti, 500 meters
Turn right onto unnamed street, 40 meters ...
Someone, looking at these instructions, said "Still a few holes in the data base." But it turns out something almost sensible is going on. Some segments of traffic circles are "unnamed streets".