Omaha drivers are being warned about getting barnacles: not on their boats, but on their cars. The City Council this week voted to have the suction device that goes by that name placed on car windshields if the driver has three overdue parking tickets. Barnacles have the same intended effect as the "boot" wheel clamp, and can only be removed if the fines are paid. Drivers will have 24 hours to pay fines before their vehicle is towed. The council also voted to increase fine totals.