Businesses engaged in posting, managing, and leasing outdoor advertising are required by the Texas Department of Transportation to submit surety bonds prior to advertising within the state. The required bond amount for advertising in one county is $2,500. Each additional county requires an additional $2,500 of coverage, and applicants who advertise in four or more counties must submit $10,000 surety bonds. These bonds ensure that advertisers agree to abide by all provisions of the V.T.C.A., Transportation Code, Chapter 391. Specifically, this bond protects the state from financial loss up to the full bond amount if the principal erects or maintains any unlawful sign or signs.