Standard&Poor's Ratings Services assigned its 'SP-1+' short-term rating to Metropolitan Transportation Authority (MTA), N.Y.'s following series of transportation revenue bond anticipation notes: $728 million series 2015A-1, due Aug. 1, 2016; $12 million series 2015B-2a, due Aug. 1, 2016 (taxable); $12 million series 2015B-2b, due Oct. 1, 2016 (taxable); $12 million series 2015B-2c, due Feb. 1, 2017 (taxable); $12 million series 2015B-2d, due June 1, 2017 (taxable); $12 million series 2015B-2e, due Oct. 1, 2017 (taxable); and $12 million series 2015B-2f, due Feb. 1, 2018 (taxable). Standard&Poor's also affirmed the following ratings: Its 'AA-' issuer credit rating (ICR) on the MTA, Its 'AA-' long-term rating and underlying rating (SPUR) on the MTA's previously issued transportation revenue bonds