According to Independence Township & verification from Miss Dig - flags are for fiber optics from AT&T.  AT&T number = 877-780-5422 and website att.com/fiberfaqs.  Door hangers were placed weeks back.  Project is underway - Independence Township DPW confirmed project timeline by street:  1st:  Woodcrest Ridge - 2nd: Mockingbird - 3rd: Chestnut Hill Drive.  MISS DIG - DIAL 811.