A major snarl in railroad traffic is ricocheting through the supply chains of businesses across the U.S. A major snarl in railroad traffic is ricocheting through the supply chains of businesses across the U.S., causing delays and losses for shippers of goods ranging from coal to sugar. Many of the problems stem from pileups at BNSF Railway Co. in a critical northern stretch of the country where it is shipping crude oil from North Dakota’s booming Bakken Shale region. The railroad, one of the biggest in North America, was already taxed by the heavy demand for oil transport. But its difficulties multiplied when it ran out of locomotives and crew, as a bitter winter forced it to use smaller trains. That has caused a ripple effect across the country as shipments have been […]