...Norfolk Southern's credit metrics should remain relatively consistent despite an increased level of share repurchases. During the first nine months of 2018, Norfolk Southern Corp. repurchased $2.3 billion of its shares compared with $712 million in the prior-year period, yet its credit metrics improved modestly because of its strong cash flow, and S&P Global Ratings expects such trends to continue. The company's free cash flow benefited from tax reform enacted in December 2017, under which its tax rate declined to 23% in 2018 compared with 36% previously. Operating performance should continue to benefit from strong economic and industry trends, barring a material slowing of the U.S. economy. We expect Norfolk Southern, similar to the other North American railroads, to continue to benefit from increased traffic levels due to a strong economy and demand for freight transportation. Intermodal (particularly domestic container) traffic levels should also continue to benefit from diversion of...