SAN FRANCISCO--(BUSINESS WIRE)--Fitch Ratings assigns an 'AA' rating to the following City and County of San Francisco, California (the city) general obligation bonds (GOs): --approximately $61 million GOs (transportation and road improvement bonds, 2014) series 2015B. Proceeds will be used to fund street, transportation and related infrastructure improvements in the city. The GOs are expected to be sold via competitive sale on or about June 23. The Rating Outlook is Positive. SECURITY The seri