UPS, one of North America’s largest intermodal shippers, has told federal regulators that it is against Canadian Pacific Railway's (CP's) proposed acquisition of Norfolk Southern Corp. (NS). UPS' thumbs-down has dealt a severe blow to CP's $28 billion bid to acquire U.S. eastern railroad NS. UPS Inc. is the largest transport company in the U.S. and one of the nation's biggest users of intermodal services. UPS has asked the Surface Transportation Board (STB) to reject the proposal on grounds that it will lead to diminished service levels and higher costs. UPS also warned that the acquisition would result in a spree of rail-industry consolidation that would impair intermodal service reliability even more.