The Thumb part of the state is East of M15 and north of I-69.
Big Cities in the thumb are Port Huron, Bad Axe and Bay City.
Some of the Home of Signs you’ll find are:
Akron
Bay Port
Caro
Carsonville
Cass City
Columbiaville
Croswell
Davison
Deckerville
Essexville
Gagetown
Harbor Beach
Kinde
Marlette
Millington
North Branch
Port Huron
Port Sanilac
Sandusky
Sebewaing
Ubly
Unionville
Vassar
Yale