Year-to-date 2010, Omaha, Neb.-based Union Pacific Corp.'s weekly car loadings and intermodal traffic rose 13% versus 2009. Increased demand for automotive, intermodal, and chemicals traffic drove volume improvement, which we expect to bolster earnings growth and strengthen credit metrics over the next several quarters. We expect Union Pacific to continue to benefit from modest core pricing gains, effective cost management, and improved operating efficiency. We are affirming our ratings on the company, including the 'BBB' long-term corporate credit rating. We are revising the outlook to positive from stable. On April 19, 2010, Standard&Poor's Ratings Services affirmed the ratings on U.S.-based Union Pacific Corp., including the 'BBB' long-term corporate credit rating. At the same time, we revised the outlook