The city of Chicago, for example, collects your signs and starts building a case against you. You want to stay OFF Chicago property as much as possible. Use H Wires If you aer going to be so daring and put your signs up on the highway ramps, make sure you use H wires, and not zip ties, to fasten your signs. By using H wires, you can put your signs out Thursday, and pick them up Sunday, with little to no