Commuters travelling along the Sheffield Parkway this morning can read how Lisa is getting revenge on her husband, Paul.
The sign says: “To my cheating husband Paul.
“You deserve each other. When you get home I won’t be there.
“Enjoy your drive to work. Lisa.”
Paul and Lisa’s identities were not immediately clear, with some onlookers speculating that the whole thing could be an advertising stunt.
The sign is situated near to South Yorkshire Police’s Nunnery Square building.
Anco Digital, the owner of the board, said the message appeared between 6am and 9am this morning.