This Norwegian road sign means business, as it marks areas where polar bears may cross. Unlike frog warnings, this one does carry real danger. Drive cautiously, stay alert, ...

This Norwegian road sign means business, as it marks areas where polar bears may cross. Unlike frog warnings, this one does carry real danger.

OSLO, Norway, June 19 (UPI) -- Traffic authorities say Norwegian motorists have become desensitized to many signs warning them moose may cross the road. As a result, the triangular markers do ...