One sign announcing the sale may be erected at which the sale is being conducted and two signs may be erected off the premises at locations selected by the applicant. Such signs shall be erected no earlier than the night before the first day of the sale and such signs shall be removed no later than the close of the final day of the sale. The signs or placards may be no larger than three square feet and must be without illumination, movement or illusion of movement. No sign or placard shall be attached in any manner to any utility pole, fence or any other structure within any public right of way. No sign or placard shall be erected which constitutes a traffic hazard.