NEW YORK (S&P Global Ratings) Sept. 29, 2017--S&P Global Ratings corrected by withdrawing its 'AA' underlying rating (SPUR) on Illinois Regional Transportation Authority's bonds maturing in 2019-2029, 2031, 2034, and 2035 due to a misapplied rating to the entire issue. The long-term rating on the authority's series 2017A general obligation refunding bonds is revised to 'AA'. The outlook is stable.