NEW YORK--(BUSINESS WIRE)--Link to Fitch Ratings' Report: 2015 Midyear Outlook: U.S. Transportation Infrastructure (Steady Performance with Challenges Ahead) https://www.fitchratings.com/creditdesk/reports/report_frame.cfm?rpt_id=868369 Stable operational and financial performance will remain intact for U.S. transportation for the remainder of 2015, though the sector is still enduring some challenges, according to Fitch Ratings in its mid-year outlook report. Growth for airports is solidifying,