CHICAGO--(BUSINESS WIRE)--Fitch Ratings has affirmed the 'A' rating on Cameron County, Texas' (the county) approximately $4.6 million international toll bridge system revenue bonds. The Rating Outlook remains Stable. In addition, the bridge system has an outstanding obligation of approximately $12.1 million to the county relating to the bridge system's pro rata share of the county's series 2008 and series 2011 limited tax certificates of obligations. This obligation is on parity with the bridge